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With a cat flap you can let your cat go in and out of your home on their own. This lets your pet move around freely and encourages exercise. It also prevents obesity and relieves boredom. Taskers can install cat flaps in wooden or uPVC doors Some can also work with wall installations. They will start by marking the location of the door, and drilling around its corners. How do you install a cat flap A cat flap lets your pet go outside without having to open the door or window. This is a great option for those who work late