https://blogfreely.net/hammers....teven45/choosing-cat
https://squareblogs.net/breadb....ird98/installing-a-c
Introduce your cat to the flap prior to when it's set up so they can become familiar with the size and shape. The flap should be opened and let them explore it from every angle. Make sure the cutout is square and even. Mark the screw holes on the door and align them with the opening for the cat flap The distance between the edges must be the same. Preparation Installing a cat flap in your home is beneficial for the health and well-being