https://nerdgaming.science/wiki/Fitting_a_Cat_Flap
Introduce your cat to the flap before it's set up so they can be familiar with the size and shape. Prop the flap open and let them explore it from every angle. Make sure the cutout is even and square. Mark the screw holes on your door and align them with the opening of the cat flap The distance between the edges should be the same. Preparation Having a cat flap installed in your home can be beneficial for the health and well-being of your pet. It will allow your pet to move from the inside to the outside without you needing to allow th