Sullivan is a sheepdog.
He likes to herd things.
Especially his owners.
Have you ever tried vacuuming/dusting/gardening/mopping/laundry-folding with an 80 pound puppy nipping at the backs of your calves? I didn't think so. Take it from me, it's nearly impossible. If it weren't for these overpriced, all-natural, made-in-the-USA chew toys, I wouldn't be able to get anything done around the house.
So, Mr. Inventor of the Rawhide? I could kiss you on the mouth. Myself and my sanity thank you.