client/src/App.jsx

@@ -5,6 +5,7 @@ import DogList from './pages/DogList'
 import DogDetail from './pages/DogDetail'
 import PedigreeView from './pages/PedigreeView'
 import LitterList from './pages/LitterList'
+import LitterDetail from './pages/LitterDetail'
 import BreedingCalendar from './pages/BreedingCalendar'
 import PairingSimulator from './pages/PairingSimulator'
 import './App.css'
@@ -55,6 +56,7 @@ function App() {
             <Route path="/dogs/:id" element={<DogDetail />} />
             <Route path="/pedigree/:id" element={<PedigreeView />} />
             <Route path="/litters" element={<LitterList />} />
+            <Route path="/litters/:id" element={<LitterDetail />} />
             <Route path="/breeding" element={<BreedingCalendar />} />
             <Route path="/pairing" element={<PairingSimulator />} />
           </Routes>

client/src/components/LitterForm.jsx

@@ -2,7 +2,7 @@ import { useState, useEffect } from 'react'
 import { X } from 'lucide-react'
 import axios from 'axios'
 
-function LitterForm({ litter, onClose, onSave }) {
+function LitterForm({ litter, prefill, onClose, onSave }) {
   const [formData, setFormData] = useState({
     sire_id: '',
     dam_id: '',
@@ -26,8 +26,16 @@ function LitterForm({ litter, onClose, onSave }) {
         puppy_count: litter.puppy_count || 0,
         notes: litter.notes || ''
       })
+    } else if (prefill) {
+      // Pre-populate from BreedingCalendar "Record Litter" flow
+      setFormData(prev => ({
+        ...prev,
+        dam_id: prefill.dam_id ? String(prefill.dam_id) : '',
+        breeding_date: prefill.breeding_date || '',
+        whelping_date: prefill.whelping_date || '',
+      }))
     }
-  }, [litter])
+  }, [litter, prefill])
 
   const fetchDogs = async () => {
     try {
@@ -69,7 +77,7 @@ function LitterForm({ litter, onClose, onSave }) {
     <div className="modal-overlay" onClick={onClose}>
       <div className="modal-content" onClick={(e) => e.stopPropagation()}>
         <div className="modal-header">
-          <h2>{litter ? 'Edit Litter' : 'Create New Litter'}</h2>
+          <h2>{litter ? 'Edit Litter' : prefill ? `Record Litter — ${prefill.dam_name || 'Dam pre-selected'}` : 'Create New Litter'}</h2>
           <button className="btn-icon" onClick={onClose}>
             <X size={24} />
           </button>
@@ -78,6 +86,20 @@ function LitterForm({ litter, onClose, onSave }) {
         <form onSubmit={handleSubmit} className="modal-body">
           {error && <div className="error">{error}</div>}
 
+          {prefill && !litter && (
+            <div style={{
+              background: 'rgba(16,185,129,0.08)',
+              border: '1px solid rgba(16,185,129,0.3)',
+              borderRadius: 'var(--radius-sm)',
+              padding: '0.6rem 0.875rem',
+              marginBottom: '1rem',
+              fontSize: '0.85rem',
+              color: 'var(--success)'
+            }}>
+              🐾 Pre-filled from heat cycle — select a sire to complete the litter record.
+            </div>
+          )}
+
           <div className="form-grid">
             <div className="form-group">
               <label className="label">Sire (Father) *</label>
@@ -111,6 +133,11 @@ function LitterForm({ litter, onClose, onSave }) {
                   <option key={d.id} value={d.id}>{d.name} {d.registration_number ? `(${d.registration_number})` : ''}</option>
                 ))}
               </select>
+              {prefill?.dam_name && !litter && (
+                <p style={{ fontSize: '0.78rem', color: 'var(--success)', marginTop: '0.25rem' }}>
+                  ✓ Pre-selected: {prefill.dam_name}
+                </p>
+              )}
             </div>
 
             <div className="form-group">

client/src/pages/BreedingCalendar.jsx

@@ -1,15 +1,17 @@
 import { useEffect, useState, useCallback } from 'react'
 import {
   Heart, ChevronLeft, ChevronRight, Plus, X,
-  CalendarDays, FlaskConical, Baby, AlertCircle, CheckCircle2
+  CalendarDays, FlaskConical, Baby, AlertCircle, CheckCircle2, Activity
 } from 'lucide-react'
+import { useNavigate } from 'react-router-dom'
+import axios from 'axios'
 
 // ─── Date helpers ────────────────────────────────────────────────────────────
 const toISO = d => d.toISOString().split('T')[0]
 const addDays = (dateStr, n) => {
   const d = new Date(dateStr); d.setDate(d.getDate() + n); return toISO(d)
 }
-const fmt = str => str ? new Date(str + 'T00:00:00').toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' }) : '—'
+const fmt = str => str ? new Date(str + 'T00:00:00').toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' }) : '–'
 const today = toISO(new Date())
 
 // ─── Cycle window classifier ─────────────────────────────────────────────────
@@ -74,7 +76,7 @@ function StartCycleModal({ females, onClose, onSaved }) {
             <div className="form-group">
               <label className="label">Female Dog *</label>
               <select value={dogId} onChange={e => setDogId(e.target.value)} required>
-                <option value="">— Select Female —</option>
+                <option value="">– Select Female –</option>
                 {females.map(d => (
                   <option key={d.id} value={d.id}>
                     {d.name}{d.breed ? ` · ${d.breed}` : ''}
@@ -105,7 +107,7 @@ function StartCycleModal({ females, onClose, onSaved }) {
 }
 
 // ─── Cycle Detail Modal ───────────────────────────────────────────────────────
-function CycleDetailModal({ cycle, onClose, onDeleted }) {
+function CycleDetailModal({ cycle, onClose, onDeleted, onRecordLitter }) {
   const [suggestions, setSuggestions] = useState(null)
   const [breedingDate, setBreedingDate] = useState(cycle.breeding_date || '')
   const [savingBreed, setSavingBreed] = useState(false)
@@ -146,6 +148,7 @@ function CycleDetailModal({ cycle, onClose, onDeleted }) {
   }
 
   const whelp = suggestions?.whelping
+  const hasBreedingDate = !!(breedingDate && breedingDate === cycle.breeding_date)
 
   return (
     <div className="modal-overlay" onClick={e => e.target === e.currentTarget && onClose()}>
@@ -221,7 +224,7 @@ function CycleDetailModal({ cycle, onClose, onDeleted }) {
 
           {/* Whelping estimate */}
           {whelp && (
-            <div style={{ background: 'rgba(16,185,129,0.08)', border: '1px solid rgba(16,185,129,0.3)', borderRadius: 'var(--radius)', padding: '1rem' }}>
+            <div style={{ background: 'rgba(16,185,129,0.08)', border: '1px solid rgba(16,185,129,0.3)', borderRadius: 'var(--radius)', padding: '1rem', marginBottom: '1rem' }}>
               <h3 style={{ fontSize: '0.9375rem', marginBottom: '0.75rem', display: 'flex', alignItems: 'center', gap: '0.4rem', color: 'var(--success)' }}>
                 <Baby size={16} /> Whelping Estimate
               </h3>
@@ -235,6 +238,39 @@ function CycleDetailModal({ cycle, onClose, onDeleted }) {
               </div>
             </div>
           )}
+
+          {/* Record Litter CTA — shown when breeding date is saved */}
+          {hasBreedingDate && (
+            <div style={{
+              background: 'rgba(16,185,129,0.06)',
+              border: '1px dashed rgba(16,185,129,0.5)',
+              borderRadius: 'var(--radius)',
+              padding: '0.875rem 1rem',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'space-between',
+              gap: '1rem',
+              flexWrap: 'wrap'
+            }}>
+              <div>
+                <div style={{ fontWeight: 600, fontSize: '0.9rem' }}>🐾 Ready to record the litter?</div>
+                <div style={{ fontSize: '0.8rem', color: 'var(--text-secondary)', marginTop: '0.2rem' }}>
+                  Breeding date logged on {fmt(cycle.breeding_date)}. Create a litter record to track puppies.
+                </div>
+              </div>
+              <button
+                className="btn btn-primary"
+                style={{ whiteSpace: 'nowrap', fontSize: '0.85rem' }}
+                onClick={() => {
+                  onClose()
+                  onRecordLitter(cycle)
+                }}
+              >
+                <Activity size={14} style={{ marginRight: '0.4rem' }} />
+                Record Litter
+              </button>
+            </div>
+          )}
         </div>
         <div className="modal-footer" style={{ justifyContent: 'space-between' }}>
           <button className="btn btn-danger" onClick={deleteCycle} disabled={deleting}>
@@ -265,6 +301,8 @@ export default function BreedingCalendar() {
   const [showStartModal, setShowStartModal] = useState(false)
   const [selectedCycle, setSelectedCycle] = useState(null)
   const [selectedDay, setSelectedDay] = useState(null)
+  const [pendingLitterCycle, setPendingLitterCycle] = useState(null)
+  const navigate = useNavigate()
 
   const load = useCallback(async () => {
     setLoading(true)
@@ -287,6 +325,23 @@ export default function BreedingCalendar() {
 
   useEffect(() => { load() }, [load])
 
+  // When user clicks Record Litter from cycle detail, create litter and navigate
+  const handleRecordLitter = useCallback(async (cycle) => {
+    try {
+      // We need sire_id — navigate to litters page with pre-filled dam
+      // Store cycle info in sessionStorage so LitterList can pre-fill
+      sessionStorage.setItem('prefillLitter', JSON.stringify({
+        dam_id: cycle.dog_id,
+        dam_name: cycle.dog_name,
+        breeding_date: cycle.breeding_date,
+        whelping_date: cycle.whelping_date || ''
+      }))
+      navigate('/litters')
+    } catch (err) {
+      console.error(err)
+    }
+  }, [navigate])
+
   // ── Build calendar grid ──
   const firstDay = new Date(year, month, 1)
   const lastDay = new Date(year, month + 1, 0)
@@ -306,7 +361,6 @@ export default function BreedingCalendar() {
     else setMonth(m => m + 1)
   }
 
-  // Find cycles that overlap a given date
   function cyclesForDate(dateStr) {
     return cycles.filter(c => {
       const s = c.start_date
@@ -321,16 +375,12 @@ export default function BreedingCalendar() {
     if (dayCycles.length === 1) {
       setSelectedCycle(dayCycles[0])
     } else if (dayCycles.length > 1) {
-      // show first — could be upgraded to a picker
       setSelectedCycle(dayCycles[0])
     } else {
-      // Empty day click — open start modal with date pre-filled would be nice
-      // but we just open start modal; user picks date
       setShowStartModal(true)
     }
   }
 
-  // Active cycles (in current month or ongoing)
   const activeCycles = cycles.filter(c => {
     const s = c.start_date; if (!s) return false
     const end = c.end_date || addDays(s, 28)
@@ -394,7 +444,6 @@ export default function BreedingCalendar() {
               const dayCycles = dateStr ? cyclesForDate(dateStr) : []
               const isToday = dateStr === today
 
-              // Pick dominant window color for background
               let cellBg = 'transparent'
               let cellBorder = 'var(--border)'
               if (dayCycles.length > 0) {
@@ -522,6 +571,7 @@ export default function BreedingCalendar() {
           cycle={selectedCycle}
           onClose={() => setSelectedCycle(null)}
           onDeleted={() => { setSelectedCycle(null); load() }}
+          onRecordLitter={handleRecordLitter}
         />
       )}
     </div>

client/src/pages/LitterDetail.jsx

@@ -0,0 +1,344 @@
+import { useEffect, useState } from 'react'
+import { useParams, useNavigate } from 'react-router-dom'
+import { ArrowLeft, Plus, X, ExternalLink, Dog } from 'lucide-react'
+import axios from 'axios'
+import LitterForm from '../components/LitterForm'
+
+function LitterDetail() {
+  const { id } = useParams()
+  const navigate = useNavigate()
+  const [litter, setLitter] = useState(null)
+  const [loading, setLoading] = useState(true)
+  const [showEditForm, setShowEditForm] = useState(false)
+  const [showAddPuppy, setShowAddPuppy] = useState(false)
+  const [allDogs, setAllDogs] = useState([])
+  const [selectedPuppyId, setSelectedPuppyId] = useState('')
+  const [newPuppy, setNewPuppy] = useState({ name: '', sex: 'male', color: '', dob: '' })
+  const [addMode, setAddMode] = useState('existing') // 'existing' | 'new'
+  const [error, setError] = useState('')
+  const [saving, setSaving] = useState(false)
+
+  useEffect(() => {
+    fetchLitter()
+    fetchAllDogs()
+  }, [id])
+
+  const fetchLitter = async () => {
+    try {
+      const res = await axios.get(`/api/litters/${id}`)
+      setLitter(res.data)
+    } catch (err) {
+      console.error('Error fetching litter:', err)
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const fetchAllDogs = async () => {
+    try {
+      const res = await axios.get('/api/dogs')
+      setAllDogs(res.data)
+    } catch (err) {
+      console.error('Error fetching dogs:', err)
+    }
+  }
+
+  const unlinkedDogs = allDogs.filter(d => {
+    if (!litter) return false
+    const alreadyInLitter = litter.puppies?.some(p => p.id === d.id)
+    const isSireOrDam = d.id === litter.sire_id || d.id === litter.dam_id
+    return !alreadyInLitter && !isSireOrDam
+  })
+
+  const handleLinkPuppy = async () => {
+    if (!selectedPuppyId) return
+    setSaving(true)
+    setError('')
+    try {
+      await axios.post(`/api/litters/${id}/puppies/${selectedPuppyId}`)
+      setSelectedPuppyId('')
+      setShowAddPuppy(false)
+      fetchLitter()
+    } catch (err) {
+      setError(err.response?.data?.error || 'Failed to link puppy')
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  const handleCreateAndLink = async () => {
+    if (!newPuppy.name) {
+      setError('Puppy name is required')
+      return
+    }
+    setSaving(true)
+    setError('')
+    try {
+      const dob = newPuppy.dob || litter.whelping_date || litter.breeding_date
+      const res = await axios.post('/api/dogs', {
+        name: newPuppy.name,
+        sex: newPuppy.sex,
+        color: newPuppy.color,
+        date_of_birth: dob,
+        breed: litter.dam_breed || '',
+      })
+      const createdDog = res.data
+      await axios.post(`/api/litters/${id}/puppies/${createdDog.id}`)
+      setNewPuppy({ name: '', sex: 'male', color: '', dob: '' })
+      setShowAddPuppy(false)
+      fetchLitter()
+      fetchAllDogs()
+    } catch (err) {
+      setError(err.response?.data?.error || 'Failed to create puppy')
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  const handleUnlinkPuppy = async (puppyId) => {
+    if (!window.confirm('Remove this puppy from the litter? The dog record will not be deleted.')) return
+    try {
+      await axios.delete(`/api/litters/${id}/puppies/${puppyId}`)
+      fetchLitter()
+    } catch (err) {
+      console.error('Error unlinking puppy:', err)
+    }
+  }
+
+  if (loading) return <div className="container loading">Loading litter...</div>
+  if (!litter) return <div className="container"><p>Litter not found.</p></div>
+
+  const puppyCount = litter.puppies?.length ?? 0
+
+  return (
+    <div className="container">
+      {/* Header */}
+      <div style={{ display: 'flex', alignItems: 'center', gap: '1rem', marginBottom: '2rem' }}>
+        <button className="btn-icon" onClick={() => navigate('/litters')}>
+          <ArrowLeft size={20} />
+        </button>
+        <div style={{ flex: 1 }}>
+          <h1 style={{ margin: 0 }}>🐾 {litter.sire_name} × {litter.dam_name}</h1>
+          <p style={{ color: 'var(--text-secondary)', margin: '0.25rem 0 0' }}>
+            Bred: {new Date(litter.breeding_date).toLocaleDateString()}
+            {litter.whelping_date && ` • Whelped: ${new Date(litter.whelping_date).toLocaleDateString()}`}
+          </p>
+        </div>
+        <button className="btn btn-secondary" onClick={() => setShowEditForm(true)}>
+          Edit Litter
+        </button>
+      </div>
+
+      {/* Stats row */}
+      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fit, minmax(140px, 1fr))', gap: '1rem', marginBottom: '2rem' }}>
+        <div className="card" style={{ textAlign: 'center', padding: '1rem' }}>
+          <div style={{ fontSize: '2rem', fontWeight: 700, color: 'var(--accent)' }}>{puppyCount}</div>
+          <div style={{ color: 'var(--text-secondary)', fontSize: '0.85rem' }}>Puppies Linked</div>
+        </div>
+        <div className="card" style={{ textAlign: 'center', padding: '1rem' }}>
+          <div style={{ fontSize: '2rem', fontWeight: 700, color: 'var(--accent)' }}>
+            {litter.puppies?.filter(p => p.sex === 'male').length ?? 0}
+          </div>
+          <div style={{ color: 'var(--text-secondary)', fontSize: '0.85rem' }}>Males</div>
+        </div>
+        <div className="card" style={{ textAlign: 'center', padding: '1rem' }}>
+          <div style={{ fontSize: '2rem', fontWeight: 700, color: 'var(--accent)' }}>
+            {litter.puppies?.filter(p => p.sex === 'female').length ?? 0}
+          </div>
+          <div style={{ color: 'var(--text-secondary)', fontSize: '0.85rem' }}>Females</div>
+        </div>
+        {litter.puppy_count > 0 && (
+          <div className="card" style={{ textAlign: 'center', padding: '1rem' }}>
+            <div style={{ fontSize: '2rem', fontWeight: 700 }}>{litter.puppy_count}</div>
+            <div style={{ color: 'var(--text-secondary)', fontSize: '0.85rem' }}>Expected</div>
+          </div>
+        )}
+      </div>
+
+      {/* Notes */}
+      {litter.notes && (
+        <div className="card" style={{ marginBottom: '2rem', padding: '1rem', borderLeft: '3px solid var(--accent)' }}>
+          <p style={{ margin: 0, fontStyle: 'italic', color: 'var(--text-secondary)' }}>{litter.notes}</p>
+        </div>
+      )}
+
+      {/* Puppies section */}
+      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '1rem' }}>
+        <h2 style={{ margin: 0 }}>Puppies</h2>
+        <button className="btn btn-primary" onClick={() => { setShowAddPuppy(true); setError('') }}>
+          <Plus size={16} style={{ marginRight: '0.4rem' }} />
+          Add Puppy
+        </button>
+      </div>
+
+      {puppyCount === 0 ? (
+        <div className="card" style={{ textAlign: 'center', padding: '3rem' }}>
+          <Dog size={48} style={{ color: 'var(--text-secondary)', margin: '0 auto 1rem' }} />
+          <p style={{ color: 'var(--text-secondary)' }}>No puppies linked yet. Add puppies to this litter.</p>
+        </div>
+      ) : (
+        <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(220px, 1fr))', gap: '1rem' }}>
+          {litter.puppies.map(puppy => (
+            <div key={puppy.id} className="card" style={{ position: 'relative' }}>
+              <button
+                className="btn-icon"
+                onClick={() => handleUnlinkPuppy(puppy.id)}
+                title="Remove from litter"
+                style={{ position: 'absolute', top: '0.75rem', right: '0.75rem', color: '#e53e3e' }}
+              >
+                <X size={14} />
+              </button>
+              <div style={{ fontSize: '2.5rem', marginBottom: '0.5rem' }}>
+                {puppy.sex === 'male' ? '🐦' : '🐥'}
+              </div>
+              <div style={{ fontWeight: 600, marginBottom: '0.25rem' }}>{puppy.name}</div>
+              <div style={{ fontSize: '0.8rem', color: 'var(--text-secondary)' }}>
+                {puppy.sex} {puppy.color && `• ${puppy.color}`}
+              </div>
+              {puppy.date_of_birth && (
+                <div style={{ fontSize: '0.8rem', color: 'var(--text-secondary)' }}>
+                  Born: {new Date(puppy.date_of_birth).toLocaleDateString()}
+                </div>
+              )}
+              <button
+                className="btn btn-secondary"
+                style={{ marginTop: '0.75rem', width: '100%', fontSize: '0.8rem', padding: '0.4rem' }}
+                onClick={() => navigate(`/dogs/${puppy.id}`)}
+              >
+                <ExternalLink size={12} style={{ marginRight: '0.3rem' }} />
+                View Profile
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Add Puppy Modal */}
+      {showAddPuppy && (
+        <div className="modal-overlay" onClick={() => setShowAddPuppy(false)}>
+          <div className="modal-content" onClick={e => e.stopPropagation()} style={{ maxWidth: '480px' }}>
+            <div className="modal-header">
+              <h2>Add Puppy to Litter</h2>
+              <button className="btn-icon" onClick={() => setShowAddPuppy(false)}><X size={24} /></button>
+            </div>
+            <div className="modal-body">
+              {error && <div className="error" style={{ marginBottom: '1rem' }}>{error}</div>}
+
+              {/* Mode toggle */}
+              <div style={{ display: 'flex', gap: '0.5rem', marginBottom: '1.5rem' }}>
+                <button
+                  className={`btn ${addMode === 'existing' ? 'btn-primary' : 'btn-secondary'}`}
+                  onClick={() => setAddMode('existing')}
+                  style={{ flex: 1 }}
+                >
+                  Link Existing Dog
+                </button>
+                <button
+                  className={`btn ${addMode === 'new' ? 'btn-primary' : 'btn-secondary'}`}
+                  onClick={() => setAddMode('new')}
+                  style={{ flex: 1 }}
+                >
+                  Create New Puppy
+                </button>
+              </div>
+
+              {addMode === 'existing' ? (
+                <div className="form-group">
+                  <label className="label">Select Dog</label>
+                  <select
+                    className="input"
+                    value={selectedPuppyId}
+                    onChange={e => setSelectedPuppyId(e.target.value)}
+                  >
+                    <option value="">-- Select a dog --</option>
+                    {unlinkedDogs.map(d => (
+                      <option key={d.id} value={d.id}>
+                        {d.name} ({d.sex}{d.date_of_birth ? `, born ${new Date(d.date_of_birth).toLocaleDateString()}` : ''})
+                      </option>
+                    ))}
+                  </select>
+                  {unlinkedDogs.length === 0 && (
+                    <p style={{ color: 'var(--text-secondary)', fontSize: '0.85rem', marginTop: '0.5rem' }}>
+                      No unlinked dogs available. Use "Create New Puppy" instead.
+                    </p>
+                  )}
+                </div>
+              ) : (
+                <div style={{ display: 'grid', gap: '1rem' }}>
+                  <div className="form-group">
+                    <label className="label">Puppy Name *</label>
+                    <input
+                      className="input"
+                      value={newPuppy.name}
+                      onChange={e => setNewPuppy(p => ({ ...p, name: e.target.value }))}
+                      placeholder="e.g. Blue Collar"
+                    />
+                  </div>
+                  <div className="form-grid">
+                    <div className="form-group">
+                      <label className="label">Sex</label>
+                      <select
+                        className="input"
+                        value={newPuppy.sex}
+                        onChange={e => setNewPuppy(p => ({ ...p, sex: e.target.value }))}
+                      >
+                        <option value="male">Male</option>
+                        <option value="female">Female</option>
+                      </select>
+                    </div>
+                    <div className="form-group">
+                      <label className="label">Color / Markings</label>
+                      <input
+                        className="input"
+                        value={newPuppy.color}
+                        onChange={e => setNewPuppy(p => ({ ...p, color: e.target.value }))}
+                        placeholder="e.g. Black & Tan"
+                      />
+                    </div>
+                  </div>
+                  <div className="form-group">
+                    <label className="label">Date of Birth</label>
+                    <input
+                      type="date"
+                      className="input"
+                      value={newPuppy.dob}
+                      onChange={e => setNewPuppy(p => ({ ...p, dob: e.target.value }))}
+                    />
+                    {litter.whelping_date && !newPuppy.dob && (
+                      <p style={{ fontSize: '0.8rem', color: 'var(--text-secondary)', marginTop: '0.25rem' }}>
+                        Will default to whelping date: {new Date(litter.whelping_date).toLocaleDateString()}
+                      </p>
+                    )}
+                  </div>
+                </div>
+              )}
+            </div>
+            <div className="modal-footer">
+              <button className="btn btn-secondary" onClick={() => setShowAddPuppy(false)} disabled={saving}>
+                Cancel
+              </button>
+              <button
+                className="btn btn-primary"
+                disabled={saving || (addMode === 'existing' && !selectedPuppyId)}
+                onClick={addMode === 'existing' ? handleLinkPuppy : handleCreateAndLink}
+              >
+                {saving ? 'Saving...' : addMode === 'existing' ? 'Link Puppy' : 'Create & Link'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Edit Litter Modal */}
+      {showEditForm && (
+        <LitterForm
+          litter={litter}
+          onClose={() => setShowEditForm(false)}
+          onSave={fetchLitter}
+        />
+      )}
+    </div>
+  )
+}
+
+export default LitterDetail

client/src/pages/LitterList.jsx

@@ -1,60 +1,156 @@
 import { useEffect, useState } from 'react'
-import { Activity } from 'lucide-react'
+import { Activity, Plus, Edit2, Trash2, ChevronRight } from 'lucide-react'
+import { useNavigate } from 'react-router-dom'
 import axios from 'axios'
+import LitterForm from '../components/LitterForm'
 
 function LitterList() {
   const [litters, setLitters] = useState([])
   const [loading, setLoading] = useState(true)
+  const [showForm, setShowForm] = useState(false)
+  const [editingLitter, setEditingLitter] = useState(null)
+  const [prefill, setPrefill] = useState(null)
+  const navigate = useNavigate()
 
   useEffect(() => {
     fetchLitters()
+    // Auto-open form with prefill from BreedingCalendar "Record Litter" CTA
+    const stored = sessionStorage.getItem('prefillLitter')
+    if (stored) {
+      try {
+        const data = JSON.parse(stored)
+        setPrefill(data)
+        setEditingLitter(null)
+        setShowForm(true)
+      } catch (e) { /* ignore */ }
+      sessionStorage.removeItem('prefillLitter')
+    }
   }, [])
 
   const fetchLitters = async () => {
     try {
       const res = await axios.get('/api/litters')
       setLitters(res.data)
-      setLoading(false)
     } catch (error) {
       console.error('Error fetching litters:', error)
+    } finally {
       setLoading(false)
     }
   }
 
+  const handleCreate = () => {
+    setEditingLitter(null)
+    setPrefill(null)
+    setShowForm(true)
+  }
+
+  const handleEdit = (e, litter) => {
+    e.stopPropagation()
+    setEditingLitter(litter)
+    setPrefill(null)
+    setShowForm(true)
+  }
+
+  const handleDelete = async (e, id) => {
+    e.stopPropagation()
+    if (!window.confirm('Delete this litter record? Puppies will be unlinked but not deleted.')) return
+    try {
+      await axios.delete(`/api/litters/${id}`)
+      fetchLitters()
+    } catch (error) {
+      console.error('Error deleting litter:', error)
+    }
+  }
+
+  const handleSave = () => {
+    fetchLitters()
+  }
+
   if (loading) {
     return <div className="container loading">Loading litters...</div>
   }
 
   return (
     <div className="container">
-      <h1 style={{ marginBottom: '2rem' }}>Litters</h1>
+      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '2rem' }}>
+        <h1>Litters</h1>
+        <button className="btn btn-primary" onClick={handleCreate}>
+          <Plus size={18} style={{ marginRight: '0.5rem' }} />
+          New Litter
+        </button>
+      </div>
 
       {litters.length === 0 ? (
         <div className="card" style={{ textAlign: 'center', padding: '4rem' }}>
           <Activity size={64} style={{ color: 'var(--text-secondary)', margin: '0 auto 1rem' }} />
           <h2>No litters recorded yet</h2>
-          <p style={{ color: 'var(--text-secondary)' }}>Start tracking breeding records</p>
+          <p style={{ color: 'var(--text-secondary)', marginBottom: '1.5rem' }}>Create a litter after a breeding cycle to track puppies</p>
+          <button className="btn btn-primary" onClick={handleCreate}>
+            <Plus size={18} style={{ marginRight: '0.5rem' }} />
+            Create First Litter
+          </button>
         </div>
       ) : (
         <div style={{ display: 'grid', gap: '1rem' }}>
           {litters.map(litter => (
-            <div key={litter.id} className="card">
-              <h3>{litter.sire_name} × {litter.dam_name}</h3>
-              <p style={{ color: 'var(--text-secondary)', marginTop: '0.5rem' }}>
-                Breeding Date: {new Date(litter.breeding_date).toLocaleDateString()}
-              </p>
+            <div
+              key={litter.id}
+              className="card"
+              style={{ cursor: 'pointer', transition: 'border-color 0.2s' }}
+              onClick={() => navigate(`/litters/${litter.id}`)}
+            >
+              <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start' }}>
+                <div style={{ flex: 1 }}>
+                  <h3 style={{ marginBottom: '0.5rem' }}>
+                    🐾 {litter.sire_name} × {litter.dam_name}
+                  </h3>
+                  <div style={{ display: 'flex', gap: '1.5rem', flexWrap: 'wrap', color: 'var(--text-secondary)', fontSize: '0.9rem' }}>
+                    <span>📅 Bred: {new Date(litter.breeding_date).toLocaleDateString()}</span>
                     {litter.whelping_date && (
-                <p style={{ color: 'var(--text-secondary)' }}>
-                  Whelping Date: {new Date(litter.whelping_date).toLocaleDateString()}
+                      <span>💕 Whelped: {new Date(litter.whelping_date).toLocaleDateString()}</span>
+                    )}
+                    <span style={{ color: 'var(--accent)', fontWeight: 600 }}>
+                      {litter.actual_puppy_count ?? litter.puppies?.length ?? litter.puppy_count ?? 0} puppies
+                    </span>
+                  </div>
+                  {litter.notes && (
+                    <p style={{ marginTop: '0.5rem', fontSize: '0.85rem', color: 'var(--text-secondary)', fontStyle: 'italic' }}>
+                      {litter.notes}
                     </p>
                   )}
-              <p style={{ marginTop: '0.5rem' }}>
-                <strong>Puppies:</strong> {litter.puppy_count || litter.puppies?.length || 0}
-              </p>
+                </div>
+                <div style={{ display: 'flex', gap: '0.5rem', alignItems: 'center' }}>
+                  <button
+                    className="btn-icon"
+                    title="Edit litter"
+                    onClick={(e) => handleEdit(e, litter)}
+                  >
+                    <Edit2 size={16} />
+                  </button>
+                  <button
+                    className="btn-icon"
+                    title="Delete litter"
+                    onClick={(e) => handleDelete(e, litter.id)}
+                    style={{ color: '#e53e3e' }}
+                  >
+                    <Trash2 size={16} />
+                  </button>
+                  <ChevronRight size={20} style={{ color: 'var(--text-secondary)' }} />
+                </div>
+              </div>
             </div>
           ))}
         </div>
       )}
+
+      {showForm && (
+        <LitterForm
+          litter={editingLitter}
+          prefill={prefill}
+          onClose={() => setShowForm(false)}
+          onSave={handleSave}
+        />
+      )}
     </div>
   )
 }