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Cat flaps are a great option to allow your pet to come and go whenever it wants. You can choose a locking flap to prevent other animals and cats from entering your home. Installing a cat flap on a bifolding doors is possible as long as the door frame is made of toughened glass. The frame should not be damaged or rotten. It's the same as installing one on an old wooden door or uPVC. Easy to install A cat flap added to your bifold doors will allow your pet to go inside and out of your home without h