diff --git a/server/routes/dogs.js b/server/routes/dogs.js
index 9fc25ad..b320c55 100644
--- a/server/routes/dogs.js
+++ b/server/routes/dogs.js
@@ -41,7 +41,15 @@ const emptyToNull = (value) => {
 router.get('/', (req, res) => {
   try {
     const db = getDatabase();
-    const dogs = db.prepare('SELECT * FROM dogs WHERE is_active = 1 ORDER BY name').all();
+    // Select only the fields we want, excluding sire/dam if they exist
+    const dogs = db.prepare(`
+      SELECT id, name, registration_number, microchip, sex, birth_date, breed, 
+             color, weight, height, notes, litter_id, photo_urls, is_active,
+             created_at, updated_at
+      FROM dogs 
+      WHERE is_active = 1 
+      ORDER BY name
+    `).all();
     
     // Parse photo_urls JSON
     dogs.forEach(dog => {
@@ -58,7 +66,14 @@ router.get('/', (req, res) => {
 router.get('/:id', (req, res) => {
   try {
     const db = getDatabase();
-    const dog = db.prepare('SELECT * FROM dogs WHERE id = ?').get(req.params.id);
+    // Select only the fields we want, excluding sire/dam if they exist
+    const dog = db.prepare(`
+      SELECT id, name, registration_number, microchip, sex, birth_date, breed,
+             color, weight, height, notes, litter_id, photo_urls, is_active,
+             created_at, updated_at
+      FROM dogs
+      WHERE id = ?
+    `).get(req.params.id);
     
     if (!dog) {
       return res.status(404).json({ error: 'Dog not found' });
@@ -66,7 +81,7 @@ router.get('/:id', (req, res) => {
     
     dog.photo_urls = dog.photo_urls ? JSON.parse(dog.photo_urls) : [];
     
-    // Get parents
+    // Get parents from parents table
     const parents = db.prepare(`
       SELECT p.parent_type, d.* 
       FROM parents p 
@@ -93,7 +108,7 @@ router.get('/:id', (req, res) => {
 // POST create new dog
 router.post('/', (req, res) => {
   try {
-    const { name, registration_number, breed, sex, birth_date, color, microchip, notes, sire_id, dam_id } = req.body;
+    const { name, registration_number, breed, sex, birth_date, color, microchip, notes, sire_id, dam_id, litter_id } = req.body;
     
     if (!name || !breed || !sex) {
       return res.status(400).json({ error: 'Name, breed, and sex are required' });
@@ -103,8 +118,8 @@ router.post('/', (req, res) => {
     
     // Convert empty strings to null for optional fields
     const result = db.prepare(`
-      INSERT INTO dogs (name, registration_number, breed, sex, birth_date, color, microchip, notes, photo_urls)
-      VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+      INSERT INTO dogs (name, registration_number, breed, sex, birth_date, color, microchip, notes, litter_id, photo_urls)
+      VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `).run(
       name, 
       emptyToNull(registration_number), 
@@ -112,8 +127,9 @@ router.post('/', (req, res) => {
       sex, 
       emptyToNull(birth_date), 
       emptyToNull(color), 
-      emptyToNull(microchip),  // Convert empty string to NULL
-      emptyToNull(notes), 
+      emptyToNull(microchip),
+      emptyToNull(notes),
+      emptyToNull(litter_id),
       '[]'
     );
     
@@ -127,7 +143,13 @@ router.post('/', (req, res) => {
       db.prepare('INSERT INTO parents (dog_id, parent_id, parent_type) VALUES (?, ?, "dam")').run(dogId, dam_id);
     }
     
-    const dog = db.prepare('SELECT * FROM dogs WHERE id = ?').get(dogId);
+    const dog = db.prepare(`
+      SELECT id, name, registration_number, microchip, sex, birth_date, breed,
+             color, weight, height, notes, litter_id, photo_urls, is_active,
+             created_at, updated_at
+      FROM dogs
+      WHERE id = ?
+    `).get(dogId);
     dog.photo_urls = [];
     
     res.status(201).json(dog);
@@ -139,7 +161,7 @@ router.post('/', (req, res) => {
 // PUT update dog
 router.put('/:id', (req, res) => {
   try {
-    const { name, registration_number, breed, sex, birth_date, color, microchip, notes, sire_id, dam_id } = req.body;
+    const { name, registration_number, breed, sex, birth_date, color, microchip, notes, sire_id, dam_id, litter_id } = req.body;
     
     const db = getDatabase();
     
@@ -147,7 +169,7 @@ router.put('/:id', (req, res) => {
     db.prepare(`
       UPDATE dogs 
       SET name = ?, registration_number = ?, breed = ?, sex = ?, 
-          birth_date = ?, color = ?, microchip = ?, notes = ?
+          birth_date = ?, color = ?, microchip = ?, notes = ?, litter_id = ?
       WHERE id = ?
     `).run(
       name, 
@@ -156,8 +178,9 @@ router.put('/:id', (req, res) => {
       sex, 
       emptyToNull(birth_date), 
       emptyToNull(color), 
-      emptyToNull(microchip),  // Convert empty string to NULL
-      emptyToNull(notes), 
+      emptyToNull(microchip),
+      emptyToNull(notes),
+      emptyToNull(litter_id),
       req.params.id
     );
     
@@ -171,7 +194,13 @@ router.put('/:id', (req, res) => {
       db.prepare('INSERT INTO parents (dog_id, parent_id, parent_type) VALUES (?, ?, "dam")').run(req.params.id, dam_id);
     }
     
-    const dog = db.prepare('SELECT * FROM dogs WHERE id = ?').get(req.params.id);
+    const dog = db.prepare(`
+      SELECT id, name, registration_number, microchip, sex, birth_date, breed,
+             color, weight, height, notes, litter_id, photo_urls, is_active,
+             created_at, updated_at
+      FROM dogs
+      WHERE id = ?
+    `).get(req.params.id);
     dog.photo_urls = dog.photo_urls ? JSON.parse(dog.photo_urls) : [];
     
     res.json(dog);
@@ -247,4 +276,4 @@ router.delete('/:id/photos/:photoIndex', (req, res) => {
   }
 });
 
-module.exports = router;
\ No newline at end of file
+module.exports = router;