diff --git a/backend/main.py b/backend/main.py
index 13243e8..4a86eac 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -6,7 +6,6 @@
 # Initialize Flask app
 app = Flask(__name__)
 
-# Initialize Swagger (Flasgger)
 Swagger(app)
 
 # SQLite database file
@@ -62,7 +61,7 @@ def init_db():
 # API Routes
 @app.route('/api/pets', methods=['GET'])
 def get_pets():
-    """Retrieve all pets"""
+    """Retrieve all pets."""
     try:
         conn = get_db()
         cursor = conn.cursor()
@@ -85,7 +84,7 @@ def home():
 
 @app.route('/api/pets/<int:pet_id>', methods=['GET'])
 def get_pet(pet_id):
-    """Retrieve a single pet by ID"""
+    """Retrieve a single pet by ID."""
     try:
         conn = get_db()
         cursor = conn.cursor()
@@ -106,7 +105,7 @@ def get_pet(pet_id):
 
 @app.route('/api/pets', methods=['POST'])
 def add_pet():
-    """Add a new pet"""
+    """Add a new pet."""
     try:
         pet_data = request.get_json()