Fresh water is essential for your developing pup, but it's never a good idea to leave it in the crate since it might make housebreaking difficult. Dogs naturally dislike going to the bathroom in their den, so crate training is a useful aid in the process. However, if you give your puppy access to water, she will drink whenever she feels thirsty and won't be able to contain her little bladder. Repeated accidents may severely hinder the process of housebreaking your puppy, in addition to causing you and them stress and anguish. While it's not a good idea to keep water in the crate, you should never restrict your puppy's access to water when housebreaking them. Provide easy access to water, and before crate training, make sure she has had a chance to eliminate adequately.