A dog crate is a small, portable enclosure used to house and transport dogs. It can be made of metal, plastic, or fabric, and is often used as a training tool or for traveling with a dog. The crate should be large enough for the dog to stand up, turn around, and lie down comfortably, but not so large that the dog has room to eliminate in one corner and sleep in another. Crate training is a method of teaching a dog to be comfortable in a crate by gradually getting them used to spending increasing amounts of time in it. It can be a useful tool for house training, as dogs are naturally hesitant to eliminate in their sleeping area. It can also be used to safely contain a dog when it is necessary to leave them unattended, such as when traveling or during the work day.