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Cat flaps are a great option to let your pet leave and come as it pleases. You can opt for a lockable flap to prevent other animals and cats from entering your home. is possible to install a cat flap in a bifold door, as long as the door is made of toughened glass and the frame is not damaged or rotten. The procedure is similar to installing a cat flap on an old wooden door or uPVC. Easy to install Install a cat flap on your bifold door to permit your pet to go in and