diff --git a/client/src/pages/LitterDetail.jsx b/client/src/pages/LitterDetail.jsx
index ee58a88..0023c01 100644
--- a/client/src/pages/LitterDetail.jsx
+++ b/client/src/pages/LitterDetail.jsx
@@ -1,9 +1,254 @@
 import { useEffect, useState } from 'react'
 import { useParams, useNavigate } from 'react-router-dom'
-import { ArrowLeft, Plus, X, ExternalLink, Dog } from 'lucide-react'
+import { ArrowLeft, Plus, X, ExternalLink, Dog, Weight, ChevronDown, ChevronUp, Trash2 } from 'lucide-react'
 import axios from 'axios'
 import LitterForm from '../components/LitterForm'
 
+// ─── Puppy Log Panel ────────────────────────────────────────────────────────────
+function PuppyLogPanel({ litterId, puppy, whelpingDate }) {
+  const [open, setOpen] = useState(false)
+  const [logs, setLogs] = useState([])
+  const [loading, setLoading] = useState(false)
+  const [showAdd, setShowAdd] = useState(false)
+  const [form, setForm] = useState({
+    record_date: whelpingDate || '',
+    weight_oz: '',
+    weight_lbs: '',
+    notes: '',
+    record_type: 'weight_log'
+  })
+  const [saving, setSaving] = useState(false)
+
+  useEffect(() => { if (open) fetchLogs() }, [open])
+
+  const fetchLogs = async () => {
+    setLoading(true)
+    try {
+      const res = await axios.get(`/api/litters/${litterId}/puppies/${puppy.id}/logs`)
+      const parsed = res.data.map(l => {
+        try { return { ...l, _data: JSON.parse(l.description) } } catch { return { ...l, _data: {} } }
+      })
+      setLogs(parsed)
+    } catch (e) { console.error(e) }
+    finally { setLoading(false) }
+  }
+
+  const handleAdd = async () => {
+    if (!form.record_date) return
+    setSaving(true)
+    try {
+      await axios.post(`/api/litters/${litterId}/puppies/${puppy.id}/logs`, form)
+      setShowAdd(false)
+      setForm(f => ({ ...f, weight_oz: '', weight_lbs: '', notes: '' }))
+      fetchLogs()
+    } catch (e) { console.error(e) }
+    finally { setSaving(false) }
+  }
+
+  const handleDelete = async (logId) => {
+    if (!window.confirm('Delete this log entry?')) return
+    try {
+      await axios.delete(`/api/litters/${litterId}/puppies/${puppy.id}/logs/${logId}`)
+      fetchLogs()
+    } catch (e) { console.error(e) }
+  }
+
+  const TYPES = [
+    { value: 'weight_log', label: '⚖️ Weight Check' },
+    { value: 'health_note', label: '📝 Health Note' },
+    { value: 'deworming', label: '🐛 Deworming' },
+    { value: 'vaccination', label: '💉 Vaccination' },
+  ]
+
+  return (
+    <div style={{ borderTop: '1px solid var(--border)', marginTop: '0.5rem' }}>
+      <button
+        onClick={() => setOpen(o => !o)}
+        style={{
+          width: '100%', display: 'flex', alignItems: 'center', justifyContent: 'space-between',
+          background: 'none', border: 'none', cursor: 'pointer', padding: '0.5rem 0',
+          color: 'var(--text-secondary)', fontSize: '0.8rem'
+        }}
+      >
+        <span style={{ display: 'flex', alignItems: 'center', gap: '0.3rem' }}>
+          <Weight size={13} /> Logs {logs.length > 0 && `(${logs.length})`}
+        </span>
+        {open ? <ChevronUp size={13} /> : <ChevronDown size={13} />}
+      </button>
+
+      {open && (
+        <div style={{ paddingBottom: '0.5rem' }}>
+          {loading ? (
+            <p style={{ fontSize: '0.78rem', color: 'var(--text-secondary)' }}>Loading...</p>
+          ) : logs.length === 0 ? (
+            <p style={{ fontSize: '0.78rem', color: 'var(--text-secondary)' }}>No logs yet.</p>
+          ) : (
+            <div style={{ display: 'flex', flexDirection: 'column', gap: '0.35rem', marginBottom: '0.5rem' }}>
+              {logs.map(l => (
+                <div key={l.id} style={{
+                  display: 'flex', alignItems: 'flex-start', justifyContent: 'space-between',
+                  background: 'var(--bg-tertiary)', borderRadius: 'var(--radius-sm)',
+                  padding: '0.4rem 0.6rem', gap: '0.5rem'
+                }}>
+                  <div style={{ fontSize: '0.75rem', flex: 1 }}>
+                    <span style={{ fontWeight: 600 }}>
+                      {new Date(l.record_date + 'T00:00:00').toLocaleDateString()}
+                    </span>
+                    {' • '}
+                    <span style={{ color: 'var(--accent)' }}>
+                      {TYPES.find(t => t.value === l.record_type)?.label || l.record_type}
+                    </span>
+                    {l._data?.weight_oz && <span> — {l._data.weight_oz} oz</span>}
+                    {l._data?.weight_lbs && <span> ({l._data.weight_lbs} lbs)</span>}
+                    {l._data?.notes && (
+                      <div style={{ color: 'var(--text-secondary)', marginTop: '0.1rem' }}>
+                        {l._data.notes}
+                      </div>
+                    )}
+                  </div>
+                  <button
+                    onClick={() => handleDelete(l.id)}
+                    style={{ background: 'none', border: 'none', cursor: 'pointer', color: '#e53e3e', padding: 0, flexShrink: 0 }}
+                  >
+                    <Trash2 size={12} />
+                  </button>
+                </div>
+              ))}
+            </div>
+          )}
+
+          {showAdd ? (
+            <div style={{ display: 'flex', flexDirection: 'column', gap: '0.4rem' }}>
+              <div style={{ display: 'flex', gap: '0.4rem', flexWrap: 'wrap' }}>
+                <input
+                  type="date" className="input"
+                  style={{ fontSize: '0.78rem', padding: '0.3rem 0.5rem', flex: '1 1 120px' }}
+                  value={form.record_date}
+                  onChange={e => setForm(f => ({ ...f, record_date: e.target.value }))}
+                />
+                <select
+                  className="input"
+                  style={{ fontSize: '0.78rem', padding: '0.3rem 0.5rem', flex: '1 1 130px' }}
+                  value={form.record_type}
+                  onChange={e => setForm(f => ({ ...f, record_type: e.target.value }))}
+                >
+                  {TYPES.map(t => <option key={t.value} value={t.value}>{t.label}</option>)}
+                </select>
+              </div>
+              {form.record_type === 'weight_log' && (
+                <div style={{ display: 'flex', gap: '0.4rem' }}>
+                  <input
+                    type="number" className="input" placeholder="oz" step="0.1" min="0"
+                    style={{ fontSize: '0.78rem', padding: '0.3rem 0.5rem', flex: 1 }}
+                    value={form.weight_oz}
+                    onChange={e => setForm(f => ({ ...f, weight_oz: e.target.value }))}
+                  />
+                  <input
+                    type="number" className="input" placeholder="lbs" step="0.01" min="0"
+                    style={{ fontSize: '0.78rem', padding: '0.3rem 0.5rem', flex: 1 }}
+                    value={form.weight_lbs}
+                    onChange={e => setForm(f => ({ ...f, weight_lbs: e.target.value }))}
+                  />
+                </div>
+              )}
+              <input
+                className="input" placeholder="Notes (optional)"
+                style={{ fontSize: '0.78rem', padding: '0.3rem 0.5rem' }}
+                value={form.notes}
+                onChange={e => setForm(f => ({ ...f, notes: e.target.value }))}
+              />
+              <div style={{ display: 'flex', gap: '0.4rem' }}>
+                <button
+                  className="btn btn-primary"
+                  style={{ fontSize: '0.75rem', padding: '0.3rem 0.75rem' }}
+                  onClick={handleAdd} disabled={saving}
+                >
+                  {saving ? 'Saving...' : 'Save'}
+                </button>
+                <button
+                  className="btn btn-secondary"
+                  style={{ fontSize: '0.75rem', padding: '0.3rem 0.75rem' }}
+                  onClick={() => setShowAdd(false)}
+                >
+                  Cancel
+                </button>
+              </div>
+            </div>
+          ) : (
+            <button
+              className="btn btn-secondary"
+              style={{ fontSize: '0.75rem', padding: '0.3rem 0.75rem', width: '100%' }}
+              onClick={() => setShowAdd(true)}
+            >
+              <Plus size={12} style={{ marginRight: '0.3rem' }} /> Add Log Entry
+            </button>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}
+
+// ─── Whelping Window Banner ───────────────────────────────────────────────
+function addDays(dateStr, n) {
+  const d = new Date(dateStr + 'T00:00:00')
+  d.setDate(d.getDate() + n)
+  return d
+}
+function fmt(d) { return d.toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' }) }
+
+function WhelpingBanner({ breedingDate, whelpingDate }) {
+  if (whelpingDate) return null // already whelped, no need for estimate
+  if (!breedingDate) return null
+
+  const earliest = addDays(breedingDate, 58)
+  const expected = addDays(breedingDate, 63)
+  const latest = addDays(breedingDate, 68)
+  const today = new Date()
+  const daysUntil = Math.ceil((expected - today) / 86400000)
+
+  let urgency = 'var(--success)'
+  let urgencyBg = 'rgba(16,185,129,0.06)'
+  let statusLabel = `~${daysUntil} days away`
+  if (daysUntil <= 7 && daysUntil > 0) {
+    urgency = '#d97706'; urgencyBg = 'rgba(217,119,6,0.08)'
+    statusLabel = `⚠️ ${daysUntil} days — prepare whelping area!`
+  } else if (daysUntil <= 0) {
+    urgency = '#e53e3e'; urgencyBg = 'rgba(229,62,62,0.08)'
+    statusLabel = '🔴 Expected date has passed — confirm or update whelping date'
+  }
+
+  return (
+    <div className="card" style={{
+      marginBottom: '2rem', padding: '1rem',
+      borderLeft: `3px solid ${urgency}`,
+      background: urgencyBg
+    }}>
+      <div style={{ fontWeight: 600, marginBottom: '0.5rem', color: urgency }}>
+        💕 Projected Whelping Window
+        <span style={{ fontWeight: 400, fontSize: '0.82rem', marginLeft: '0.75rem', color: 'var(--text-secondary)' }}>
+          {statusLabel}
+        </span>
+      </div>
+      <div style={{ display: 'flex', gap: '2rem', flexWrap: 'wrap', fontSize: '0.875rem' }}>
+        <div>
+          <span style={{ color: 'var(--text-secondary)', fontSize: '0.78rem' }}>Earliest (Day 58)</span>
+          <br /><strong>{fmt(earliest)}</strong>
+        </div>
+        <div>
+          <span style={{ color: 'var(--text-secondary)', fontSize: '0.78rem' }}>Expected (Day 63)</span>
+          <br /><strong style={{ color: urgency, fontSize: '1rem' }}>{fmt(expected)}</strong>
+        </div>
+        <div>
+          <span style={{ color: 'var(--text-secondary)', fontSize: '0.78rem' }}>Latest (Day 68)</span>
+          <br /><strong>{fmt(latest)}</strong>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+// ─── Main LitterDetail ─────────────────────────────────────────────────────────
 function LitterDetail() {
   const { id } = useParams()
   const navigate = useNavigate()
@@ -14,14 +259,11 @@ function LitterDetail() {
   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 [addMode, setAddMode] = useState('existing')
   const [error, setError] = useState('')
   const [saving, setSaving] = useState(false)
 
-  useEffect(() => {
-    fetchLitter()
-    fetchAllDogs()
-  }, [id])
+  useEffect(() => { fetchLitter(); fetchAllDogs() }, [id])
 
   const fetchLitter = async () => {
     try {
@@ -38,9 +280,7 @@ function LitterDetail() {
     try {
       const res = await axios.get('/api/dogs')
       setAllDogs(res.data)
-    } catch (err) {
-      console.error('Error fetching dogs:', err)
-    }
+    } catch (err) { console.error('Error fetching dogs:', err) }
   }
 
   const unlinkedDogs = allDogs.filter(d => {
@@ -52,47 +292,31 @@ function LitterDetail() {
 
   const handleLinkPuppy = async () => {
     if (!selectedPuppyId) return
-    setSaving(true)
-    setError('')
+    setSaving(true); setError('')
     try {
       await axios.post(`/api/litters/${id}/puppies/${selectedPuppyId}`)
-      setSelectedPuppyId('')
-      setShowAddPuppy(false)
-      fetchLitter()
+      setSelectedPuppyId(''); setShowAddPuppy(false); fetchLitter()
     } catch (err) {
       setError(err.response?.data?.error || 'Failed to link puppy')
-    } finally {
-      setSaving(false)
-    }
+    } finally { setSaving(false) }
   }
 
   const handleCreateAndLink = async () => {
-    if (!newPuppy.name) {
-      setError('Puppy name is required')
-      return
-    }
-    setSaving(true)
-    setError('')
+    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,
+        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}`)
+      await axios.post(`/api/litters/${id}/puppies/${res.data.id}`)
       setNewPuppy({ name: '', sex: 'male', color: '', dob: '' })
-      setShowAddPuppy(false)
-      fetchLitter()
-      fetchAllDogs()
+      setShowAddPuppy(false); fetchLitter(); fetchAllDogs()
     } catch (err) {
       setError(err.response?.data?.error || 'Failed to create puppy')
-    } finally {
-      setSaving(false)
-    }
+    } finally { setSaving(false) }
   }
 
   const handleUnlinkPuppy = async (puppyId) => {
@@ -100,9 +324,7 @@ function LitterDetail() {
     try {
       await axios.delete(`/api/litters/${id}/puppies/${puppyId}`)
       fetchLitter()
-    } catch (err) {
-      console.error('Error unlinking puppy:', err)
-    }
+    } catch (err) { console.error('Error unlinking puppy:', err) }
   }
 
   if (loading) return <div className="container loading">Loading litter...</div>
@@ -120,13 +342,11 @@ function LitterDetail() {
         <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()}`}
+            Bred: {new Date(litter.breeding_date + 'T00:00:00').toLocaleDateString()}
+            {litter.whelping_date && ` • Whelped: ${new Date(litter.whelping_date + 'T00:00:00').toLocaleDateString()}`}
           </p>
         </div>
-        <button className="btn btn-secondary" onClick={() => setShowEditForm(true)}>
-          Edit Litter
-        </button>
+        <button className="btn btn-secondary" onClick={() => setShowEditForm(true)}>Edit Litter</button>
       </div>
 
       {/* Stats row */}
@@ -155,6 +375,9 @@ function LitterDetail() {
         )}
       </div>
 
+      {/* Projected whelping window */}
+      <WhelpingBanner breedingDate={litter.breeding_date} whelpingDate={litter.whelping_date} />
+
       {/* Notes */}
       {litter.notes && (
         <div className="card" style={{ marginBottom: '2rem', padding: '1rem', borderLeft: '3px solid var(--accent)' }}>
@@ -177,7 +400,7 @@ function LitterDetail() {
           <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' }}>
+        <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(240px, 1fr))', gap: '1rem' }}>
           {litter.puppies.map(puppy => (
             <div key={puppy.id} className="card" style={{ position: 'relative' }}>
               <button
@@ -197,7 +420,7 @@ function LitterDetail() {
               </div>
               {puppy.date_of_birth && (
                 <div style={{ fontSize: '0.8rem', color: 'var(--text-secondary)' }}>
-                  Born: {new Date(puppy.date_of_birth).toLocaleDateString()}
+                  Born: {new Date(puppy.date_of_birth + 'T00:00:00').toLocaleDateString()}
                 </div>
               )}
               <button
@@ -208,6 +431,13 @@ function LitterDetail() {
                 <ExternalLink size={12} style={{ marginRight: '0.3rem' }} />
                 View Profile
               </button>
+
+              {/* Weight / Health Log collapsible */}
+              <PuppyLogPanel
+                litterId={id}
+                puppy={puppy}
+                whelpingDate={litter.whelping_date || litter.breeding_date}
+              />
             </div>
           ))}
         </div>
@@ -223,37 +453,22 @@ function LitterDetail() {
             </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>
+                <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)}
-                  >
+                  <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()}` : ''})
+                        {d.name} ({d.sex}{d.date_of_birth ? `, born ${new Date(d.date_of_birth + 'T00:00:00').toLocaleDateString()}` : ''})
                       </option>
                     ))}
                   </select>
@@ -267,46 +482,33 @@ function LitterDetail() {
                 <div style={{ display: 'grid', gap: '1rem' }}>
                   <div className="form-group">
                     <label className="label">Puppy Name *</label>
-                    <input
-                      className="input"
-                      value={newPuppy.name}
+                    <input className="input" value={newPuppy.name}
                       onChange={e => setNewPuppy(p => ({ ...p, name: e.target.value }))}
-                      placeholder="e.g. Blue Collar"
-                    />
+                      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 }))}
-                      >
+                      <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}
+                      <input className="input" value={newPuppy.color}
                         onChange={e => setNewPuppy(p => ({ ...p, color: e.target.value }))}
-                        placeholder="e.g. Black & Tan"
-                      />
+                        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 }))}
-                    />
+                    <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()}
+                        Will default to whelping date: {new Date(litter.whelping_date + 'T00:00:00').toLocaleDateString()}
                       </p>
                     )}
                   </div>
@@ -314,9 +516,7 @@ function LitterDetail() {
               )}
             </div>
             <div className="modal-footer">
-              <button className="btn btn-secondary" onClick={() => setShowAddPuppy(false)} disabled={saving}>
-                Cancel
-              </button>
+              <button className="btn btn-secondary" onClick={() => setShowAddPuppy(false)} disabled={saving}>Cancel</button>
               <button
                 className="btn btn-primary"
                 disabled={saving || (addMode === 'existing' && !selectedPuppyId)}
@@ -329,7 +529,6 @@ function LitterDetail() {
         </div>
       )}
 
-      {/* Edit Litter Modal */}
       {showEditForm && (
         <LitterForm
           litter={litter}
diff --git a/server/routes/litters.js b/server/routes/litters.js
index e8cf492..c400be3 100644
--- a/server/routes/litters.js
+++ b/server/routes/litters.js
@@ -16,17 +16,13 @@ router.get('/', (req, res) => {
       ORDER BY l.breeding_date DESC
     `).all();
     
-    // Get puppies for each litter using litter_id
     litters.forEach(litter => {
       litter.puppies = db.prepare(`
         SELECT * FROM dogs WHERE litter_id = ? AND is_active = 1
       `).all(litter.id);
-      
       litter.puppies.forEach(puppy => {
         puppy.photo_urls = puppy.photo_urls ? JSON.parse(puppy.photo_urls) : [];
       });
-      
-      // Update puppy_count based on actual puppies
       litter.actual_puppy_count = litter.puppies.length;
     });
     
@@ -36,14 +32,14 @@ router.get('/', (req, res) => {
   }
 });
 
-// GET single litter
+// GET single litter with puppies
 router.get('/:id', (req, res) => {
   try {
     const db = getDatabase();
     const litter = db.prepare(`
-      SELECT l.*, 
-        s.*, s.name as sire_name,
-        d.*, d.name as dam_name
+      SELECT l.*,
+        s.name as sire_name, s.registration_number as sire_reg, s.breed as sire_breed,
+        d.name as dam_name, d.registration_number as dam_reg, d.breed as dam_breed
       FROM litters l
       JOIN dogs s ON l.sire_id = s.id
       JOIN dogs d ON l.dam_id = d.id
@@ -54,7 +50,6 @@ router.get('/:id', (req, res) => {
       return res.status(404).json({ error: 'Litter not found' });
     }
     
-    // Get puppies using litter_id
     litter.puppies = db.prepare(`
       SELECT * FROM dogs WHERE litter_id = ? AND is_active = 1
     `).all(litter.id);
@@ -74,7 +69,7 @@ router.get('/:id', (req, res) => {
 // POST create new litter
 router.post('/', (req, res) => {
   try {
-    const { sire_id, dam_id, breeding_date, whelping_date, notes } = req.body;
+    const { sire_id, dam_id, breeding_date, whelping_date, puppy_count, notes } = req.body;
     
     if (!sire_id || !dam_id || !breeding_date) {
       return res.status(400).json({ error: 'Sire, dam, and breeding date are required' });
@@ -82,7 +77,6 @@ router.post('/', (req, res) => {
     
     const db = getDatabase();
     
-    // Verify sire is male and dam is female
     const sire = db.prepare('SELECT sex FROM dogs WHERE id = ?').get(sire_id);
     const dam = db.prepare('SELECT sex FROM dogs WHERE id = ?').get(dam_id);
     
@@ -94,12 +88,11 @@ router.post('/', (req, res) => {
     }
     
     const result = db.prepare(`
-      INSERT INTO litters (sire_id, dam_id, breeding_date, whelping_date, notes)
-      VALUES (?, ?, ?, ?, ?)
-    `).run(sire_id, dam_id, breeding_date, whelping_date, notes);
+      INSERT INTO litters (sire_id, dam_id, breeding_date, whelping_date, puppy_count, notes)
+      VALUES (?, ?, ?, ?, ?, ?)
+    `).run(sire_id, dam_id, breeding_date, whelping_date || null, puppy_count || 0, notes || null);
     
     const litter = db.prepare('SELECT * FROM litters WHERE id = ?').get(result.lastInsertRowid);
-    
     res.status(201).json(litter);
   } catch (error) {
     res.status(500).json({ error: error.message });
@@ -110,13 +103,12 @@ router.post('/', (req, res) => {
 router.put('/:id', (req, res) => {
   try {
     const { breeding_date, whelping_date, puppy_count, notes } = req.body;
-    
     const db = getDatabase();
     db.prepare(`
       UPDATE litters 
       SET breeding_date = ?, whelping_date = ?, puppy_count = ?, notes = ?
       WHERE id = ?
-    `).run(breeding_date, whelping_date, puppy_count, notes, req.params.id);
+    `).run(breeding_date, whelping_date || null, puppy_count || 0, notes || null, req.params.id);
     
     const litter = db.prepare('SELECT * FROM litters WHERE id = ?').get(req.params.id);
     res.json(litter);
@@ -131,22 +123,14 @@ router.post('/:id/puppies/:puppyId', (req, res) => {
     const { id: litterId, puppyId } = req.params;
     const db = getDatabase();
     
-    // Verify litter exists
     const litter = db.prepare('SELECT sire_id, dam_id FROM litters WHERE id = ?').get(litterId);
-    if (!litter) {
-      return res.status(404).json({ error: 'Litter not found' });
-    }
+    if (!litter) return res.status(404).json({ error: 'Litter not found' });
     
-    // Verify puppy exists
     const puppy = db.prepare('SELECT id FROM dogs WHERE id = ?').get(puppyId);
-    if (!puppy) {
-      return res.status(404).json({ error: 'Puppy not found' });
-    }
+    if (!puppy) return res.status(404).json({ error: 'Puppy not found' });
     
-    // Link puppy to litter
     db.prepare('UPDATE dogs SET litter_id = ? WHERE id = ?').run(litterId, puppyId);
     
-    // Also update parent relationships if not set
     const existingParents = db.prepare('SELECT parent_type FROM parents WHERE dog_id = ?').all(puppyId);
     const hasSire = existingParents.some(p => p.parent_type === 'sire');
     const hasDam = existingParents.some(p => p.parent_type === 'dam');
@@ -169,26 +153,77 @@ router.delete('/:id/puppies/:puppyId', (req, res) => {
   try {
     const { puppyId } = req.params;
     const db = getDatabase();
-    
     db.prepare('UPDATE dogs SET litter_id = NULL WHERE id = ?').run(puppyId);
-    
     res.json({ message: 'Puppy removed from litter' });
   } catch (error) {
     res.status(500).json({ error: error.message });
   }
 });
 
+// ─── Puppy Weight / Health Log ───────────────────────────────────────────────
+
+// GET weight/health logs for a puppy
+router.get('/:litterId/puppies/:puppyId/logs', (req, res) => {
+  try {
+    const db = getDatabase();
+    // Use health_records table with note field to store weight logs
+    const logs = db.prepare(`
+      SELECT * FROM health_records
+      WHERE dog_id = ? AND record_type = 'weight_log'
+      ORDER BY record_date ASC
+    `).all(req.params.puppyId);
+    res.json(logs);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// POST add weight/health log entry for a puppy
+router.post('/:litterId/puppies/:puppyId/logs', (req, res) => {
+  try {
+    const { puppyId } = req.params;
+    const { record_date, weight_oz, weight_lbs, notes, record_type } = req.body;
+    
+    if (!record_date) return res.status(400).json({ error: 'record_date is required' });
+    
+    const db = getDatabase();
+    
+    // Store weight as notes JSON in health_records
+    const description = JSON.stringify({
+      weight_oz: weight_oz || null,
+      weight_lbs: weight_lbs || null,
+      notes: notes || ''
+    });
+    
+    const result = db.prepare(`
+      INSERT INTO health_records (dog_id, record_type, record_date, description, vet_name)
+      VALUES (?, ?, ?, ?, ?)
+    `).run(puppyId, record_type || 'weight_log', record_date, description, null);
+    
+    const log = db.prepare('SELECT * FROM health_records WHERE id = ?').get(result.lastInsertRowid);
+    res.status(201).json(log);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// DELETE weight/health log entry
+router.delete('/:litterId/puppies/:puppyId/logs/:logId', (req, res) => {
+  try {
+    const db = getDatabase();
+    db.prepare('DELETE FROM health_records WHERE id = ? AND dog_id = ?').run(req.params.logId, req.params.puppyId);
+    res.json({ message: 'Log entry deleted' });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
 // DELETE litter
 router.delete('/:id', (req, res) => {
   try {
     const db = getDatabase();
-    
-    // Remove litter_id from associated puppies
     db.prepare('UPDATE dogs SET litter_id = NULL WHERE litter_id = ?').run(req.params.id);
-    
-    // Delete the litter
     db.prepare('DELETE FROM litters WHERE id = ?').run(req.params.id);
-    
     res.json({ message: 'Litter deleted successfully' });
   } catch (error) {
     res.status(500).json({ error: error.message });