Every day, our dogs require two important activities: catching the ball (Giaco can go forever if we could do it), and playing TUG. While playing TUG, Cody usually growls in a pulsating way: RRrrrrRRrrrrRRrrrrr with accents on the tugs. Giaco is more soft spoken but joins in. I too join in on the growling. They will tug together, but prefer that I tug as well. In tugging, Cody could go on forever. He gets this far-away look in his eyes and turns into micro-wolf.
I realized that this is a daily ritual, and what a funny one it is.