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A cat flap lets you to allow your pet to roam more freely without the headache of having to let them in and out. It can also help your pet be less stressed and stop them from entering the house when they're not needed. To place a cat flap on your door, measure from the bottom of their stomach to the floor, and draw a line 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 an expert if you are planning to ins