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If you have a cat or dog installing a pet flap on your French or patio doors is a great idea. It makes it easy for them to get in and out without needing to open the door. There are a variety of cat flaps available designed to fit in uPVC, composite, or wooden doors. Some come with a four-way locking system that can be set to exit only, in-only, or open. Installation Cat flaps are an excellent way to let your cat into and out of your home without opening the front door every time. This is particularly useful if your cat lov