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A through-wall cat flap allows your pets to come in and out as they please. You must be careful not to put it too high in the wall. This can cause energy loss and allow burglars to enter your home. Additionally, if you're planning to sell your home in the near future, having an opening in a cavity wall could pose an issue for new owners. Glass cat doors are a safer alternative. Easy to install A through-wall cat flap allows your cat to