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A through-wall cat flap lets your pets come in and out as they please. Be careful to not install it too high into the wall. This can lead to energy loss and the risk of burglars gaining access to your home. A hole in a cavity could be a problem for future owners should you decide to sell your house. Glass cat doors are a safer alternative. Easy to install A wall-to-wall cat flap lets your cat to come and go as it pleases. There are many models and they are simple to put up. Certain models allow you t