https://jsfiddle.net/yng7ha0d/
Installing a cat flap in to your home can be a huge step for any pet owner. There are a variety of options for you, whether your cat is old and requires extra security, or you have kittens that require to be vetted. It can be difficult for non-professionals to install the cat flap, but with right instructions it's easy. Preparation, planning and accuracy are the keys. Select the Right Door or Windows There are a myriad of kinds of cat flaps, including some with locks that can be used to prevent your pet from getting out or in and others with high tech fea