https://selfless.wiki/wiki/How...._to_Train_Your_Cat_t
Professional cat flap installers can install your pet's door into either a door, or a wall. This is more secure because burglars are unable to get through it. It also prevents drafts and lowers your energy costs. The Tasker will mark the location of the cat flap in your door, and then cut the corners. They will also smooth the edges of the frame for a smooth finish. Microchip cat flaps A microchip cat flap is a simple and effective method to keep your pet in your home. It reads the unique identification microchip in the