Our lovely dog is about 18 months old now and he has always slept in his crate at night. He goes in there happily and we never hear a peep out of him until we let him out in the morning (except on the odd occasion where he's had a stomach upset...) My question is, is there any reason to stop crating him at night? I've seen quite a lot of things which seem to suggest they should stop at about 6 months, but is there any reason to do this if we're all, including the dog, quite happy with the situation?