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Installing a cat flap on a door allows your pet to come and go as it pleases. Follow the steps below to find out how to draw the shape, cut it with a jigsaw/hole saw and install your cat's flap. You can prevent wild animals, pests, and stray cats from entering your cat's area if it has a Manual Four-Way Lock. You can also keep a few pots of plants for your cat to hide in. Placement A cat flap is not only a way for your pet to go outside more easily, but it could also keep unwanted animals like rodents and cats