My dogs each have their own crate. Darby has always tried to use Cash's crate and Cash won't go in when he's in there but also won't use another crate. Mostly I just let them settle their own disputes, but it's getting to where Cash is very cranky and at the same time not as able as he used to be so I've started making Darby get out of Cash's crate and get in his own to nap. How does everyone else handle this? Do you just let them work it out or do you make them use their own crates?