As a puppy, Kai used to have vocal yawns. It was SOOO cute. I remember on the way home from the breeder's, he was in my arms and did a vocal yawn. It was adorable.

Kaedyn doesn't make any sounds when he yawns but he grunts alot. If you squeeze him a bit when you hug him, he'll grunt. It's kind of a "oh..bugger off!" kind of grunt.