I understand that people don't leave their dogs for days on end without water, but how would you like to be told that you can't have access to water all day? We are responsible for taking care of them and to me leaving an animal without water is cruel.
My grandmother raised poodles in the early 80's and one of my jobs was to make sure they had fresh water all day everyday and not one of them spent any time in any kind of crate or cage. My dog has free run of our back yard and has his own "room" in a basement away from the heat, rain, and cold and plenty of fresh, clean water. Even when we lived in our old house, he stayed in a playpen on newspaper and had access to water all day.
I don't think it is appropriate to crate a dog, they weren't meant to be in crates. I don't see how it is safe, unless you are traveling. Even my little 4lb rabbit has a huge enclosure (6ft x 2ft), so she isn't shut in a small space.
Suzanne