diff --git a/gerbil-manager-web/e2e/stammbaum.spec.ts b/gerbil-manager-web/e2e/stammbaum.spec.ts
index 2f55793..e9d6ecf 100644
--- a/gerbil-manager-web/e2e/stammbaum.spec.ts
+++ b/gerbil-manager-web/e2e/stammbaum.spec.ts
@@ -137,3 +137,20 @@ test('Kein Würfe-Panel wenn Wurzeltier keine Würfe hat (STAMMBAUM-LITTERS)', a
   await expect(page.locator('.pedigree-card').first()).toBeVisible()
   await expect(page.locator('.stammbaum-litters-panel')).not.toBeVisible()
 })
+
+test('Knoten-Karte zeigt volles Geburtsdatum (STAMMBAUM-FULLDATE)', async ({ page }) => {
+  skipUnlessMock()
+  // Krümel: dateOfBirth '2025-03-12' → formatDate → '12.03.2025'
+  await page.goto('/rennmaeuse/kruemel/stammbaum')
+  await expect(page.locator('.pedigree-card').first()).toBeVisible()
+  await expect(page.locator('.pedigree-card__year').first()).toContainText('12.03.2025')
+})
+
+test('Gencode-Chip zeigt Genotyp statt Farbname (STAMMBAUM-GENCODE)', async ({ page }) => {
+  skipUnlessMock()
+  // Fridolin ist Vater von Krümel — genotype 'aa CC DD EE GG PP spsp rere'
+  await page.goto('/rennmaeuse/kruemel/stammbaum')
+  await expect(page.locator('.pedigree-card').first()).toBeVisible()
+  const fridolinCard = page.locator('.pedigree-card').filter({ hasText: 'Fridolin' })
+  await expect(fridolinCard.locator('.pedigree-chip')).toContainText('aa CC')
+})
diff --git a/gerbil-manager-web/src/components/AppShell.tsx b/gerbil-manager-web/src/components/AppShell.tsx
index 043260f..06b2c93 100644
--- a/gerbil-manager-web/src/components/AppShell.tsx
+++ b/gerbil-manager-web/src/components/AppShell.tsx
@@ -1,19 +1,21 @@
 import { useState } from 'react'
+import type { ReactNode } from 'react'
 import { NavLink, Outlet } from 'react-router-dom'
 import { de } from '../strings/de'
+import GerbilIcon from './GerbilIcon'
 import './appShell.css'
 
 interface NavItem {
   to: string
   label: string
-  icon: string
+  icon: ReactNode
   end?: boolean
 }
 
 // Primary items are always visible in the phone bottom bar; secondary items
 // move into the "Mehr" sheet on phones and appear inline in the desktop sidebar.
 const PRIMARY: NavItem[] = [
-  { to: '/rennmaeuse', label: de.nav.gerbils, icon: '🐭' },
+  { to: '/rennmaeuse', label: de.nav.gerbils, icon: <GerbilIcon size="1.25em" /> },
   { to: '/wuerfe', label: de.nav.litters, icon: '🍼' },
   { to: '/genetik', label: de.nav.genetics, icon: '🧬' },
 ]
@@ -46,7 +48,7 @@ export default function AppShell() {
   return (
     <div className="app-shell">
       <header className="app-header">
-        <span className="app-logo" aria-hidden="true">🐭</span>
+        <span className="app-logo" aria-hidden="true"><GerbilIcon size="1.5rem" /></span>
         <h1 className="app-title">{de.app.title}</h1>
       </header>
 
diff --git a/gerbil-manager-web/src/components/GerbilIcon.tsx b/gerbil-manager-web/src/components/GerbilIcon.tsx
new file mode 100644
index 0000000..7209852
--- /dev/null
+++ b/gerbil-manager-web/src/components/GerbilIcon.tsx
@@ -0,0 +1,35 @@
+import type { CSSProperties } from 'react'
+
+interface Props {
+  size?: string | number
+  style?: CSSProperties
+  className?: string
+}
+
+/** Reusable gerbil silhouette icon — upright sitting pose, long tail with tuft. fill=currentColor. */
+export default function GerbilIcon({ size = '1em', style, className }: Props) {
+  return (
+    <svg
+      viewBox="0 0 64 64"
+      fill="currentColor"
+      xmlns="http://www.w3.org/2000/svg"
+      width={size}
+      height={size}
+      style={{ display: 'inline-block', verticalAlign: '-0.125em', flexShrink: 0, ...style }}
+      className={className}
+      role="img"
+      aria-label="Rennmaus"
+    >
+      {/* body — sitting upright */}
+      <path d="M40 14c6 0 11 5 11 12 0 4-2 7-2 11 0 10-6 16-15 16-8 0-14-6-14-15 0-13 9-24 20-24z" />
+      {/* ear */}
+      <circle cx="46" cy="15" r="5" />
+      {/* hind paw */}
+      <ellipse cx="24" cy="52" rx="9" ry="3.5" />
+      {/* long curved tail with tuft */}
+      <path d="M16 51c-7 1-13-2-15-9-1-4 0-8 3-10 1 3 1 6 3 8 3 3 7 4 11 4z" />
+      {/* front paw */}
+      <path d="M30 45c3 0 5 1 5 4-3 1-6 1-7-2 0-1 1-2 2-2z" />
+    </svg>
+  )
+}
diff --git a/gerbil-manager-web/src/pages/StammbaumPage.tsx b/gerbil-manager-web/src/pages/StammbaumPage.tsx
index 120051c..a450599 100644
--- a/gerbil-manager-web/src/pages/StammbaumPage.tsx
+++ b/gerbil-manager-web/src/pages/StammbaumPage.tsx
@@ -28,6 +28,7 @@ import { getInbreedingCoefficient } from '../api/pedigree'
 import type { Gender, Gerbil, Litter } from '../api/types'
 import { useApi } from '../hooks/useApi'
 import { formatDate, genderLabel } from '../format/labels'
+import GerbilIcon from '../components/GerbilIcon'
 import { UNKNOWN_FARBSCHLAG, fromDisplayString, genotypeToFarbschlag, toDisplayString } from '../genetics'
 import {
   DEFAULT_GENERATIONS,
@@ -379,7 +380,7 @@ function PedigreeCard({
   const t = de.pages.stammbaum
   const g = node.gerbil
   const chip = farbschlag ? chipColorFor(farbschlag) : null
-  const year = g.dateOfBirth ? g.dateOfBirth.slice(0, 4) : null
+  const dob = g.dateOfBirth ? formatDate(g.dateOfBirth) : null
   return (
     <div
       className={isRoot ? 'pedigree-card pedigree-card--root' : 'pedigree-card'}
@@ -389,7 +390,7 @@ function PedigreeCard({
     >
       {/* Foto-Platzhalter — echte Fotos kommen mit FEAT-6. */}
       <div className="pedigree-card__photo" aria-hidden="true">
-        🐭
+        <GerbilIcon size="1.6rem" />
       </div>
       <div className="pedigree-card__body">
         <div className="pedigree-card__name">
@@ -406,11 +407,12 @@ function PedigreeCard({
           <span
             className="pedigree-chip"
             style={chip ? { background: chip.bg, color: chip.fg } : undefined}
+            title={farbschlag}
           >
-            {farbschlag}
+            {g.genotype || farbschlag}
           </span>
         )}
-        {year && <span className="pedigree-card__year">* {year}</span>}
+        {dob && <span className="pedigree-card__year">* {dob}</span>}
       </div>
       {node.expandable && (
         <button
diff --git a/gerbil-manager-web/src/pages/stammbaum.css b/gerbil-manager-web/src/pages/stammbaum.css
index 4814943..13f5836 100644
--- a/gerbil-manager-web/src/pages/stammbaum.css
+++ b/gerbil-manager-web/src/pages/stammbaum.css
@@ -285,14 +285,15 @@
 .pedigree-chip {
   align-self: flex-start;
   max-width: 100%;
-  font-size: 0.68rem;
+  font-size: 0.62rem;
   padding: 0.1rem 0.45rem;
   border-radius: 1rem;
   background: var(--color-accent-soft);
   color: var(--color-accent);
-  white-space: nowrap;
+  white-space: normal;
+  word-break: break-word;
   overflow: hidden;
-  text-overflow: ellipsis;
+  line-height: 1.3;
 }
 
 .pedigree-card__year {