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Professional cat flap installers can install your pet's door into either a door, or a wall. The latter is more secure since burglars cannot get through it. It also reduces energy bills and prevents draughts. The Tasker will mark the location where the cat flap should be inside your door, and then drill out the corners. They will also sand the edges of the frame to give it a smooth surface. Microchip cat flaps A microchip cat door is an ea