https://leon-bridges.mdwrite.n....et/fitting-a-cat-fla
If you wish to let your pet to come and go whenever they want without having to open the door, you can install a cat flap. However, you must hire a vetted professional to do so. They are able to handle the complexity of fitting various types of cat flaps to various walls and doors. Installation With a cat flap your pet can come in and out of the house at will without you having to open the door. The range of pet flaps available on the market is extensive, ranging including microchip-proof and bite-proof doors