https://imoodle.win/wiki/Through_Wall_Cat_Flap
Installing a cat flap on an entrance door lets your pet to come or go whenever it wants. Follow the steps below to discover how to mark the shape, cut it using a jigsaw/hole saw and install your cat's 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 keep some plant pots for your cat to nestle in. Placement A cat flap can be used to keep animals from entering like rodents and cats. Some models allow you to lock them, so that you can regulate your cat's moveme