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If you have a dog or cat, installing a pet flap on your French or patio doors is a good idea. It allows them to enter and exit without you needing to open the door. There are several options for cat flaps that are designed to fit in uPVC, composite, or wooden doors. Some have a four-way locking system that can be set to exit only by entering only the direction of opening, or in both. Installation Cat flaps are an excellent way to let your cat into and out of your home without opening the front door every tim