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A cat flap fitting professional will place your pet's door inside a door or a wall. The wall-mounted version is more secure, because an intruder won't be able to get through. It also reduces energy costs and prevents draughts. The Tasker will mark where the cat flap is in your door, then drill out the corners. They will also sand the edges of the frame to create a smooth surface. Microchip cat flaps A microchip cat door is an easy and effective way to keep pets in your home. It reads the unique microchip identification in your pet