https://zenwriting.net/johnber....ry6/fitting-a-cat-fl
Installing a cat flap onto a door allows your pet to come or go when it wants. Follow the steps to learn how to mark out the shape, then use the jigsaw or hole saw to cut it and install your cat flap. If your cat's flap has a manual 4-Way lock you can restrict access to wild animals as well as pests and strays. You can also store pots of plants for your cat to hide in. Placement A cat flap can be used to keep animals from entering such as rodents or cats. Certain models let you close them so that you can control your cat's movements.