It is fairly likely that you have heard of dog doors. Most people know that dogs like to go outside for a number of reasons, and pet doors make it so that people do not have to go to the door and let their dog out every time this happens. However, these doors can be beneficial to cats and their owners as well. Many cats like to spend time both indoors and outdoors, and these doors can serve the same purpose that they do with dogs, in that they allow the cats to go outside without you having to stop what you are doing and let them outside. Advanced Window Products is one company that offers these types of doors, and you can consider the types of doors they have available that can be of assistance to you and your cat.