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If you would like to allow your pet to go and come whenever they want without opening the door, you can install a cat flap. You should hire an expert to install the cat flap. They will help you navigate the complicated process of fitting different types of cat flaps into various walls and doors. Installation With a cat flap, your pet can enter and leave the house at will without you having to open the door. There are a variety of pet flaps that are available including microchip-reading and bite-proof doors to fully insulated