https://zenwriting.net/cakecri....b86/window-with-cat-
You and your cat will both benefit from having the cat flap inside your bifold door. It can also help keep extreme hot or cold weather from entering your home. First, you must measure your pet in order to determine what size door flap is required. This will help you design an opening for the flap that is the correct size. Outdoor Access The installation of a cat flap in an exterior back door isn't a task for a novice, those with little DIY experience can usually manage it. This will save you the expense and hassle of calling a carp