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A professional cat flap fitter will install your pet door into a door, or in the wall. The latter is more secure as the burglar cannot reach through it. It also reduces energy costs and helps to prevent draughts. The Tasker will mark the location of the cat flap inside your door and then drill the corners. They will also sand the edges of your frame for a smooth finish. Microchip cat flaps A microchip cat flap is an easy and effective