https://mozillabd.science/wiki..../Cat_Flaps_For_Frenc
Introduce your cat to the flap prior to installation so that they can become familiar with its size and shape. The flap should be opened and let your cat explore it from every angle. Make sure that the cutout is even and square. Mark the screw holes and align them with the cat flap opening. The distance between the edges must be equal. Preparation A cat flap in your home is beneficial for the health and wellbeing of your pet. It allows your pet to move from inside to the outside without needing to allow them in or out. It will a