Can someone help me regarding the size of a dog's crate? We have a crate we've used since getting Duke. He has gotten so tall that his head reaches the top of the crate when he sits. The height of the crate is 24 inches. He fits fine in the rest of the crate. He can turn around comfortably and we've yet to give him use of the whole crate since he seems comfortable this way and we've had it this way since potty training. My question is should the dog be able to sit up comfortably in the crate or is it's purpose for him to just be able to lay in it while we are gone? He is in the crate a few times a week for 3-4 hours at a time.