One of the most valuable tools in housetraining is the dog crate, a better word is a ‘Den’. Intended to be used like a baby’s playpen or crib, the crate keeps the puppy safely confined when no one is available to supervise her.
Crating prevents accidents for the normal puppy, because her instinct to keep her nest clean is very strong Crating also prevents her from destroying your treasured possessions while she is teething, or injuring herself by chewing on or ingesting something harmful.
Your puppy should be crated at night while you are asleep, and any other time you cannot supervise his activities. This includes times when you are on the phone or in the shower, or doing anything that prevents you from paying full attention to your puppy. He should have an opportunity to go outside every time you let him out of his crate.