A cat flap is a hole inside your door that enables your cat to move around according to their own preferences. This design isn't particularly secure and gives burglars access to your home. You may also consider upgrading to a lockable or automated model that comes with more security features. https://cat-flap-fitting-near-me65181.blogdiloz.com/29997681/adding-a-cat-flap-to-your-bifold-doors