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Introduce your cat to the flap prior to the installation so that they can become familiar with its dimensions and shape. Prop the flap open and let them explore it from all angles. Make sure the cutout is even and square. Mark the screw holes and align them with your cat flap opening. The distance between the edges must be the same. Preparation Installing a cat-proof flap in your home is beneficial for the health and well-being of your pet. It allows your pet to freely move from inside to the outside without you having allow them to enter or leave. I