diff --git a/client/src/pages/PedigreeView.jsx b/client/src/pages/PedigreeView.jsx
index 0d72a9a..89757fe 100644
--- a/client/src/pages/PedigreeView.jsx
+++ b/client/src/pages/PedigreeView.jsx
@@ -3,7 +3,7 @@ import { useParams, useNavigate } from 'react-router-dom'
 import { ArrowLeft, GitBranch, AlertCircle, Loader } from 'lucide-react'
 import axios from 'axios'
 import PedigreeTree from '../components/PedigreeTree'
-import { transformPedigreeData, formatCOI, getPedigreeCompleteness } from '../utils/pedigreeHelpers'
+import { transformPedigreeData, transformDescendantData, formatCOI, getPedigreeCompleteness } from '../utils/pedigreeHelpers'
 
 function PedigreeView() {
   const { id } = useParams()
@@ -14,28 +14,39 @@ function PedigreeView() {
   const [pedigreeData, setPedigreeData] = useState(null)
   const [coiData, setCoiData] = useState(null)
   const [generations, setGenerations] = useState(5)
+  const [viewMode, setViewMode] = useState('ancestors')
 
   useEffect(() => {
     fetchPedigreeData()
-  }, [id, generations])
+  }, [id, generations, viewMode])
 
   const fetchPedigreeData = async () => {
     setLoading(true)
     setError('')
 
     try {
-      const pedigreeRes = await axios.get(`/api/pedigree/${id}`)
-      const dogData = pedigreeRes.data
-      setDog(dogData)
+      if (viewMode === 'ancestors') {
+        const pedigreeRes = await axios.get(`/api/pedigree/${id}`)
+        const dogData = pedigreeRes.data
+        setDog(dogData)
 
-      const treeData = transformPedigreeData(dogData, generations)
-      setPedigreeData(treeData)
+        const treeData = transformPedigreeData(dogData, generations)
+        setPedigreeData(treeData)
 
-      try {
-        const coiRes = await axios.get(`/api/pedigree/${id}/coi`)
-        setCoiData(coiRes.data)
-      } catch (coiError) {
-        console.warn('COI calculation unavailable:', coiError)
+        try {
+          const coiRes = await axios.get(`/api/pedigree/${id}/coi`)
+          setCoiData(coiRes.data)
+        } catch (coiError) {
+          console.warn('COI calculation unavailable:', coiError)
+          setCoiData(null)
+        }
+      } else {
+        const descendantRes = await axios.get(`/api/pedigree/${id}/descendants?generations=${generations}`)
+        const dogData = descendantRes.data
+        setDog(dogData)
+
+        const treeData = transformDescendantData(dogData, generations)
+        setPedigreeData(treeData)
         setCoiData(null)
       }
 
@@ -86,7 +97,7 @@ function PedigreeView() {
   return (
     <div className="container">
       {/* Header */}
-      <div style={{ display: 'flex', alignItems: 'center', gap: '1rem', marginBottom: '1.5rem' }}>
+      <div style={{ display: 'flex', alignItems: 'center', gap: '1rem', marginBottom: '1.5rem', flexWrap: 'wrap' }}>
         <button
           className="btn btn-secondary"
           onClick={() => navigate(`/dogs/${id}`)}
@@ -96,10 +107,10 @@ function PedigreeView() {
           Back to Profile
         </button>
 
-        <div style={{ flex: 1 }}>
+        <div style={{ flex: 1, minWidth: '200px' }}>
           <h1 style={{ margin: 0, display: 'flex', alignItems: 'center', gap: '0.75rem' }}>
             <GitBranch size={32} style={{ color: 'var(--primary)' }} />
-            {dog?.name}'s Pedigree
+            {dog?.name}'s {viewMode === 'ancestors' ? 'Pedigree' : 'Descendants'}
           </h1>
           {dog?.registration_number && (
             <p style={{ color: 'var(--text-secondary)', margin: '0.25rem 0 0 0' }}>
@@ -107,65 +118,86 @@ function PedigreeView() {
             </p>
           )}
         </div>
+
+        <div style={{ display: 'flex', background: 'var(--bg-tertiary)', padding: '4px', borderRadius: 'var(--radius)' }}>
+          <button
+            className={`btn ${viewMode === 'ancestors' ? 'btn-primary' : 'btn-ghost'}`}
+            onClick={() => setViewMode('ancestors')}
+            style={{ padding: '0.5rem 1rem' }}
+          >
+            Ancestors
+          </button>
+          <button
+            className={`btn ${viewMode === 'descendants' ? 'btn-primary' : 'btn-ghost'}`}
+            onClick={() => setViewMode('descendants')}
+            style={{ padding: '0.5rem 1rem' }}
+          >
+            Descendants
+          </button>
+        </div>
       </div>
 
       {/* Stats Bar */}
       <div className="card" style={{ marginBottom: '1rem', padding: '1rem' }}>
         <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fit, minmax(200px, 1fr))', gap: '1.5rem' }}>
 
-          {/* COI */}
-          <div>
-            <div style={{ fontSize: '0.875rem', color: 'var(--text-muted)', marginBottom: '0.25rem', textTransform: 'uppercase', letterSpacing: '0.05em', fontWeight: 500 }}>
-              Coefficient of Inbreeding
-            </div>
-            <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
-              <span style={{ fontSize: '1.5rem', fontWeight: '700', color: coiInfo.color }}>
-                {coiInfo.value}
-              </span>
-              <span style={{
-                fontSize: '0.75rem',
-                padding: '0.25rem 0.5rem',
-                borderRadius: '4px',
-                background: coiInfo.color + '20',
-                color: coiInfo.color,
-                textTransform: 'uppercase',
-                fontWeight: '600'
-              }}>
-                {coiInfo.level}
-              </span>
-            </div>
-            <div style={{ fontSize: '0.75rem', color: 'var(--text-muted)', marginTop: '0.25rem' }}>
-              {coiInfo.description}
-            </div>
-          </div>
-
-          {/* Completeness */}
-          <div>
-            <div style={{ fontSize: '0.875rem', color: 'var(--text-muted)', marginBottom: '0.25rem', textTransform: 'uppercase', letterSpacing: '0.05em', fontWeight: 500 }}>
-              Pedigree Completeness
-            </div>
-            <div style={{ fontSize: '1.5rem', fontWeight: '700', color: 'var(--text-primary)' }}>
-              {completeness}%
-            </div>
-            <div style={{ marginTop: '0.5rem' }}>
-              <div style={{
-                height: '6px',
-                background: 'var(--bg-tertiary)',
-                borderRadius: '3px',
-                overflow: 'hidden',
-                border: '1px solid var(--border)'
-              }}>
-                <div style={{
-                  height: '100%',
-                  width: `${completeness}%`,
-                  background: barColor,
-                  borderRadius: '3px',
-                  transition: 'width 0.4s ease',
-                  boxShadow: `0 0 6px ${barColor}`
-                }} />
+          {viewMode === 'ancestors' && (
+            <>
+              {/* COI */}
+              <div>
+                <div style={{ fontSize: '0.875rem', color: 'var(--text-muted)', marginBottom: '0.25rem', textTransform: 'uppercase', letterSpacing: '0.05em', fontWeight: 500 }}>
+                  Coefficient of Inbreeding
+                </div>
+                <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
+                  <span style={{ fontSize: '1.5rem', fontWeight: '700', color: coiInfo.color }}>
+                    {coiInfo.value}
+                  </span>
+                  <span style={{
+                    fontSize: '0.75rem',
+                    padding: '0.25rem 0.5rem',
+                    borderRadius: '4px',
+                    background: coiInfo.color + '20',
+                    color: coiInfo.color,
+                    textTransform: 'uppercase',
+                    fontWeight: '600'
+                  }}>
+                    {coiInfo.level}
+                  </span>
+                </div>
+                <div style={{ fontSize: '0.75rem', color: 'var(--text-muted)', marginTop: '0.25rem' }}>
+                  {coiInfo.description}
+                </div>
               </div>
-            </div>
-          </div>
+
+              {/* Completeness */}
+              <div>
+                <div style={{ fontSize: '0.875rem', color: 'var(--text-muted)', marginBottom: '0.25rem', textTransform: 'uppercase', letterSpacing: '0.05em', fontWeight: 500 }}>
+                  Pedigree Completeness
+                </div>
+                <div style={{ fontSize: '1.5rem', fontWeight: '700', color: 'var(--text-primary)' }}>
+                  {completeness}%
+                </div>
+                <div style={{ marginTop: '0.5rem' }}>
+                  <div style={{
+                    height: '6px',
+                    background: 'var(--bg-tertiary)',
+                    borderRadius: '3px',
+                    overflow: 'hidden',
+                    border: '1px solid var(--border)'
+                  }}>
+                    <div style={{
+                      height: '100%',
+                      width: `${completeness}%`,
+                      background: barColor,
+                      borderRadius: '3px',
+                      transition: 'width 0.4s ease',
+                      boxShadow: `0 0 6px ${barColor}`
+                    }} />
+                  </div>
+                </div>
+              </div>
+            </>
+          )}
 
           {/* Generations */}
           <div>
diff --git a/client/src/utils/pedigreeHelpers.js b/client/src/utils/pedigreeHelpers.js
index 7229a3d..52171f1 100644
--- a/client/src/utils/pedigreeHelpers.js
+++ b/client/src/utils/pedigreeHelpers.js
@@ -180,4 +180,48 @@ export const getPedigreeCompleteness = (treeData, targetGenerations = 5) => {
   const expectedTotal = Math.pow(2, targetGenerations) - 1
   const actualCount = countAncestors(treeData)
   return Math.min(100, Math.round((actualCount / expectedTotal) * 100))
+}
+
+/**
+ * Transform API descendant data to react-d3-tree format
+ * @param {Object} dog - Dog object from API with nested offspring array
+ * @param {number} maxGenerations - Maximum generations to display (default 3)
+ * @returns {Object} Tree data in react-d3-tree format
+ */
+export const transformDescendantData = (dog, maxGenerations = 3) => {
+  if (!dog) return null
+
+  const buildTree = (dogData, generation = 0) => {
+    if (!dogData || generation >= maxGenerations) {
+      return null
+    }
+
+    const node = {
+      name: dogData.name || 'Unknown',
+      attributes: {
+        id: dogData.id,
+        sex: dogData.sex,
+        registration: dogData.registration_number || '',
+        birth_year: dogData.birth_date ? new Date(dogData.birth_date).getFullYear() : ''
+      },
+      children: []
+    }
+
+    if (dogData.offspring && dogData.offspring.length > 0) {
+      dogData.offspring.forEach(child => {
+        const childNode = buildTree(child, generation + 1)
+        if (childNode) {
+          node.children.push(childNode)
+        }
+      })
+    }
+
+    if (node.children.length === 0) {
+      delete node.children
+    }
+
+    return node
+  }
+
+  return buildTree(dog)
 }
\ No newline at end of file