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Introduce your cat to the flap before it's installed so they can get used to the size and shape. Open the flap and let your cat explore it from every angle. Make sure the cutout is square and even. Mark the screw holes on your door and align them with the opening of the cat flap - the distance between the edges should be equal. Preparation Installing a cat flap in your home can be beneficial to the health and well-being of your pet. It will allow your pet to freely move from inside to the outside without needing to let th