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A through wall cat flap is a great way to let your pets move around whenever they want. Be careful not to put it too high into the wall. This can lead to energy loss and the risk of burglars breaking into your home. Also, if you are planning to sell your house in the near future and you have a hole in a cavity wall could pose an issue for new owners. Glass cat doors are a safer alternative. Easy to install A wall-to-wall cat flap lets your cat to come and go when it wants. There are many models and they are simple