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Integrating a cat flap in your bifold doors can offer many benefits to you and your pet. It can also prevent extreme cold or heat from entering your home. The first step is to measure your pet to determine the size of the flap you will need. will enable you to create a hole of adequate for the flap. Outdoor Access Installing a cat flap in an external back door is not a job for the novice, those with minimal DIY skills can usually do it. This can h