I have a 42" wire crate with the divider which is working out very well so far, but when do you consider your puppy ready to take up the entire crate? Will he regress if I give him too much space? Sawyer has been doing so well, perfect really, with crate training and signaling to go potty and at 17 weeks he is so leggy that I would love for him to be able to stretch out like a little prince in his crate. But I do not want to set him up for failure. Does anyone have advice on the matter?