Freedom is the major benefit that you get when you decide to install a dog door in your home. If your dog is trained, then they know they have to go outside when they need to do their business. If your doors are closed, then they do not have the freedom to go out on their own. This is where a dog door comes into play. The door allows your dog to easily move in and out of your house. You can also lock these doors if you want to restrict your dog’s access to the backyard. This is useful at night when you do not want your dog to go outside.