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Introduce your cat to the flap before it's installed so they can become familiar with the size and shape. Prop the flap open and let them explore it from all angles. Make sure that the cutout is even and square. Mark the screw holes on your door and align them with the opening for the cat flap The distance between the edges should be the same. Preparation Installing a cat flap inside your home is beneficial to the well-being and health of your pet. It will allow yo