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If you want to allow your pet to move around as they please without having to open the door, you can put in a cat flap. You should hire a professional to put in the cat flap. They can handle the complexity of putting in different types of cat flaps onto different doors and walls. Installation With a cat flap your pet can enter and out of the house at will, without needing to open the door. The range of pet flaps on the market is vast, from microchip-proof and bite-proof doors to fully enclosed cat fl