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Incorporating a cat flap into your bifold doors can offer numerous benefits for both you and your pet. It can also stop extreme heat or cold weather from entering your home. The first step is to measure your pet's size to determine the size of the door flap you will need. This will enable you to design a cat flap hole that is the right size. Outdoor Access Even those with minimal DIY skills can install a cat flap to an outside backdoor. Th