First you want to decide where you will install the cat door . Through a door is the most popular application. There are cat doors for through a wall which have tunnel kits to create the tunnel through the wall that attach to the inside frame and outside frame. If you do not want to cut holes through a door or wall, you can have a cat door in a removeable panel that fits into your sliding glass door or your window that slides up.

There are regular cat doors that just require the cat to push open the flap to go outside or to enter the house.

Electronic cat doors require the cat to wear a sensor that is either a magnet or a radio frequency tag. These doors will keep stray cats from entering your home. That can be a mess.

There are some differences in materials used in the making of cat doors. We suggest finding one that is made of a polycarbonate plastic. These flaps will not break and will last for years. Not all models have this option though. The Catwalk Cat Doors have this material used in them. All cat doors can be installed by the home handyperson. If you can cut a hole through a door or wall, the rest is very easy. The cat door panels for sliding glass doors are very easy to install and can be taken out at any time, if you are going away on vacation lets say.