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If you wish to let your pet to move around whenever they want without opening the door, you can put in an animal flap. It is recommended to hire a professional to install the flap. They are able to handle the complexity of fitting various types of cat flaps onto different doors and walls. Installation A cat flap allows your pet to move around the house as they please without having to open the door or window for them. The variety of pet flaps available on market is vast, from microchip-proof and bite-proof