https://articlescad.com/instal....ling-a-cat-flap-in-a
A cat flap-style door allows your pet to leave the house and return inside without needing to open the doors for them. The doors are available in various sizes to fit dogs and cats and come with features that can help prevent draughts or unwanted critters. It is recommended to introduce your pet the door prior to installing it. It will be easier to get them used to the size, shape and movements. Easy to install Cat flaps are available in many different places. You can install them in your garage, laundry room