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A through wall cat flap is a great method to let your pet come and go as they please. Be sure to not install it too high into the wall. This can result in the loss of energy and also allow burglars to gain entry into your home. A hole in a cavity can also be a problem for future owners should you decide to sell your house. Glass cat doors are a safer choice. Easy to install A cat flap that is built into the wall is a great option to allow your