https://world-news.wiki/wiki/Window_With_Cat_Flap
Introduce your cat to the flap prior to the installation to allow them to become familiar with its size and shape. The flap should be opened and let your cat explore it from every angle. Ensure the cut-out is even and ensure that the cut-out is square and even. Mark the screw holes and align them with the cat flap opening. The distance between the edges should be the same. Preparation A cat flap at home can be beneficial for the health and wellbeing of your pet. It allows your pet to freely move from inside to the outside, without havin