https://opensourcebridge.scien....ce/wiki/Through_Wall
A cat flap fitting professional will set up your pet's door into a door, or in a wall. This is more secure since burglars cannot get through it. It also prevents the spread of draughts and also reduces your energy costs. The Tasker will mark out the position of the cat flap on your door, and then drill the corners. They will also sand down the edges of the frame to give it a smooth surface. Microchip cat flaps A microchip cat door is an easy and effective way to keep your pet inside your home. It reads the unique identificatio