The simple answer to whether to use a dog door or not is convenience. Convenience for your dog to be able to enjoy your garden or outdoor space when they want to and go to the toilet when they need to. Convenience for you to not have to watch or listen for the dog’s request to go outside. In busy households with a lot going on, most people don’t have the time or energy to keep opening the door for the dog to go out. That’s especially true when the weather isn’t great and all the dog wants to do is sit in the garden!