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A through-wall cat flap allows your pet to go in and out whenever they like. However, you should be cautious not to put it too high on the wall. This could result in energy loss and the possibility of burglars gaining access to your home. A cavity with a hole can be a challenge for future owners if you plan to sell your house. Glass cat doors are a much safer alternative. Easy to install A cat flap that is built into the wall is a great way to let your cat leave and