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A cat flap is a great way to give your pet some freedom and avoid the hassle of letting them in and out. It will also help your pet to be less stressed and stop them from entering the home when they aren't allowed to do so. To install a cat flap in your door take a measurement from the bottom of their stomachs to the floor, and draw a line on the door panel. Verify that the line is straight using an ad hoc level. 1. The type of door It is recommended to consult an expert if you are planning to install a cat flap in the form of a uPVC or double glazi