A dog door is a flap or panel installed in a door or wall that allows a dog to enter and exit a building without human assistance. Dog doors are available in a variety of sizes and styles to accommodate different breeds of dogs and different types of doors and walls. Some dog doors are also designed with features such as weatherstripping to keep out drafts and flaps that can be locked to prevent the dog from escaping.
Dog doors can be a great convenience for dog owners, as they allow dogs to come and go as they please without having to wait for someone to open the door for them. This can be especially helpful for dogs that need to go outside frequently to relieve themselves or for dogs that enjoy spending time outdoors. Dog doors can also help to reduce the amount of dirt and debris that dogs track into the house, as they can simply go outside to do their business.