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A cat flap that runs through the wall lets your pets come out and in as they please. Be sure not to install it too high in the wall. This could result in energy loss and the possibility of burglars breaking into your home. A cavity with a hole could be a problem for future owners if you plan to sell your house. Glass cat doors are a much safer choice. Easy to install A cat flap that is built into the wall allows your cat to come or go as it pleases. It's simple to set up and there are a variety of models available. Some allow you