https://nerdgaming.science/wik....i/Back_Door_With_Cat
A cat flap lets your pet leave and enter the house at his own pace, reducing stress both for you and your feline companion. However, installing a cat flap isn't an simple task. The crucial factor in success is preparation and careful consideration. Gather your tools and materials. Note the exact location of your flap on the wall or door. Location A cat flap lets your pet to go outside to explore, eat and play without having to open and close the door every time. It also allows your cat access to their cat's food and litter