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Installing a pet flap on your French or Patio doors is a great idea if you have a dog or cat. It makes it easier for them to get into and out without needing to open the door. There are a myriad of cat flaps available to be used with uPVC wood or composite doors. Some come with a four-way locking system that can be set to exit only or in-only. Installation Cat flaps can be an excellent method of letting your cat in and out of the house without having to open the door each time. This is especially helpful for cats who like to ventu