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A cat flap that runs through the wall allows your pets to come out and in as they please. Be sure not to put it too high into the wall. This can lead to energy loss and the risk of burglars gaining access to your home. If you are planning to sell your home in the future having an opening in your cavity wall could be an issue for prospective buyers. Glass cat doors are a safer alternative. Easy to install A cat flap that is built into the wall is a great option to allow your cat to leave and c