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A professional cat flap fitter will place your pet's door inside a door or in a wall. The wall-mounted version is more secure, because an intruder won't be able to get through. It also reduces energy bills and prevents draughts. The Tasker will mark out the position of the cat flap inside your door, then make the corners of the frame. They will also sand the edges of your frame to create a smooth surface. Microchip cat flaps A microchip