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A cat flap is an excellent option to give your pet freedom and ease the burden of letting them in and out. It will also help your pet be less stressed and keep them from entering the house when they're not needed. To install a cat flap in your door, measure from the bottom of their stomach to the floor, and draw an outline on the door panel. Make use of a spirit-level for checking whether the line is straight. 1. The type of door It is best to consult a professional if you want to install a cat flap into a uPVC or double glazing glass se