diff --git a/backend/static/css/components.css b/backend/static/css/components.css
index 750fc4a..00aa066 100644
--- a/backend/static/css/components.css
+++ b/backend/static/css/components.css
@@ -1219,3 +1219,84 @@ textarea.form-control {
   color:        var(--c-primary-dark);
   font-weight:  var(--weight-semibold);
 }
+
+/* ============================================================
+   TAGEBUCH — HUNDE-PICKER (Einstiegsseite bei mehreren Hunden)
+   ============================================================ */
+
+.diary-picker-wrap {
+  display:         flex;
+  flex-direction:  column;
+  align-items:     center;
+  padding:         var(--space-8) var(--space-4) var(--space-4);
+  gap:             var(--space-5);
+}
+
+.diary-picker-hint {
+  font-size:   var(--text-lg);
+  font-weight: var(--weight-semibold);
+  color:       var(--c-text-secondary);
+  margin:      0;
+}
+
+.diary-picker-grid {
+  display:   flex;
+  flex-wrap: wrap;
+  gap:       var(--space-4);
+  justify-content: center;
+}
+
+.diary-picker-card {
+  display:        flex;
+  flex-direction: column;
+  align-items:    center;
+  gap:            var(--space-2);
+  padding:        var(--space-4);
+  width:          140px;
+  background:     var(--c-surface);
+  border:         2px solid var(--c-border);
+  border-radius:  var(--radius-lg);
+  cursor:         pointer;
+  transition:     transform var(--transition-fast), box-shadow var(--transition-fast),
+                  border-color var(--transition-fast);
+  touch-action:   manipulation;
+}
+.diary-picker-card:active {
+  transform: scale(0.96);
+}
+.diary-picker-card--active {
+  border-color: var(--c-primary);
+  box-shadow:   0 0 0 3px var(--c-primary-subtle);
+}
+
+.diary-picker-av {
+  width:         88px;
+  height:        88px;
+  border-radius: 50%;
+  overflow:      hidden;
+  background:    var(--c-surface-2);
+  display:       flex;
+  align-items:   center;
+  justify-content: center;
+  border:        3px solid var(--c-border);
+}
+.diary-picker-card--active .diary-picker-av {
+  border-color: var(--c-primary);
+}
+.diary-picker-av img {
+  width:      100%;
+  height:     100%;
+  object-fit: cover;
+}
+
+.diary-picker-name {
+  font-weight: var(--weight-semibold);
+  font-size:   var(--text-base);
+  color:       var(--c-text);
+  text-align:  center;
+}
+.diary-picker-rasse {
+  font-size:  var(--text-xs);
+  color:      var(--c-text-secondary);
+  text-align: center;
+}
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index b72fc72..116a916 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -394,7 +394,7 @@ const App = (() => {
   // ÖFFENTLICHE API
   // (andere Module können App.state, App.navigate etc. nutzen)
   // ----------------------------------------------------------
-  return { init, navigate, state, renderDogSwitcher: _renderDogSwitcher };
+  return { init, navigate, state, setActiveDog, renderDogSwitcher: _renderDogSwitcher };
 
 })();
 
diff --git a/backend/static/js/pages/diary.js b/backend/static/js/pages/diary.js
index 38933e8..356d87c 100644
--- a/backend/static/js/pages/diary.js
+++ b/backend/static/js/pages/diary.js
@@ -34,28 +34,29 @@ window.Page_diary = (() => {
   }
 
   // ----------------------------------------------------------
-  // REFRESH — erneuter Navigations-Aufruf
+  // REFRESH — erneuter Navigations-Aufruf (Tap auf Tab)
   // ----------------------------------------------------------
   async function refresh() {
     if (!_appState.activeDog) return;
-    // Wenn vorher "kein Hund"-Zustand: #diary-list existiert nicht → voll neu rendern
-    if (!_container.querySelector('#diary-list')) {
-      await _render();
+    // Mehrere Hunde → Picker zeigen (User kann Hund wählen)
+    if (_appState.dogs.length > 1) {
+      _renderDogPicker();
       return;
     }
+    // Einzelner Hund → Diary direkt neu laden
     _offset  = 0;
     _entries = [];
-    await _load();
-    _renderList();
+    await _renderDiary();
   }
 
   // ----------------------------------------------------------
-  // ON DOG CHANGE
+  // ON DOG CHANGE — vom Header-Switcher ausgelöst
   // ----------------------------------------------------------
   async function onDogChange(dog) {
     _offset  = 0;
     _entries = [];
-    await _render();
+    // Direkt Diary laden — Hund wurde bereits extern gewählt
+    await _renderDiary();
   }
 
   // ----------------------------------------------------------
@@ -66,7 +67,7 @@ window.Page_diary = (() => {
   }
 
   // ----------------------------------------------------------
-  // RENDER — Hauptstruktur
+  // RENDER — Einstieg: Picker bei mehreren Hunden, sonst direkt
   // ----------------------------------------------------------
   async function _render() {
     if (!_appState.activeDog) {
@@ -81,6 +82,53 @@ window.Page_diary = (() => {
       return;
     }
 
+    if (_appState.dogs.length > 1) {
+      _renderDogPicker();
+    } else {
+      await _renderDiary();
+    }
+  }
+
+  // ----------------------------------------------------------
+  // HUNDE-PICKER — Einstiegsseite bei mehreren Hunden
+  // ----------------------------------------------------------
+  function _renderDogPicker() {
+    const activeDogId = _appState.activeDog?.id;
+
+    const cards = _appState.dogs.map(dog => {
+      const isActive = dog.id === activeDogId;
+      const av = dog.foto_url
+        ? `<img src="${_escape(dog.foto_url)}" alt="${_escape(dog.name)}">`
+        : `<span style="font-size:2.5rem">🐕</span>`;
+      return `
+        <div class="diary-picker-card${isActive ? ' diary-picker-card--active' : ''}"
+             data-dog-id="${dog.id}">
+          <div class="diary-picker-av">${av}</div>
+          <div class="diary-picker-name">${_escape(dog.name)}</div>
+          ${dog.rasse ? `<div class="diary-picker-rasse">${_escape(dog.rasse)}</div>` : ''}
+        </div>`;
+    }).join('');
+
+    _container.innerHTML = `
+      <div class="diary-picker-wrap">
+        <p class="diary-picker-hint">Wessen Tagebuch?</p>
+        <div class="diary-picker-grid">${cards}</div>
+      </div>`;
+
+    _container.querySelectorAll('.diary-picker-card').forEach(el => {
+      el.addEventListener('click', async () => {
+        const id = parseInt(el.dataset.dogId);
+        App.setActiveDog(id);
+        // onDogChange() wird durch setActiveDog → _notifyDogChange() aufgerufen
+        // → lädt Diary direkt
+      });
+    });
+  }
+
+  // ----------------------------------------------------------
+  // DIARY-ANSICHT — Timeline mit Einträgen
+  // ----------------------------------------------------------
+  async function _renderDiary() {
     _container.innerHTML = `
       <div id="diary-list"></div>
       <div id="diary-load-more" style="display:none; text-align:center; padding:var(--space-4)">