A cat flap is a hole in your door that enables your cat to go and come as they please. This type of design isn't very secure and gives burglars easy access. You might also want to consider upgrading to a lockable or automated model with enhanced security features. This https://doorswithcatflap97234.bloggerswise.com/37543528/adding-a-cat-flap-to-your-bifold-doors