My dog throws up in his crate and only his crate. I keep his crate open all day and he goes in there to throw up. Maybe he's trying to tell me how he feels about the crate...lol. Now, the throwing up isn't chronic but he's gotten in to some things a couple of times, and he tends to throw up bile if it's too long between meals. Not that I'm complaining. Wish my cat had done that with his hairballs.
He also gives three kisses to me when I come home from work. Three kisses and then he goes into his crate to be fed. It's too freaking cute.