It just arrived! Gunny hasn't let it out of his mouth and his tail is wagging so fast I think he's going to propel himself to the ceiling!
It does stink like a new tire, but I guess that will dissipate.
It is VERY sturdy. No "give" to it. I'm thinking this is going to be
I'm glad I got the round one rather than the "stick" because I think he would be chomping at anything with an end. The most that I see happening is drool, since his teeth are clamped on the donut and his mouth is open around it.
I'll check back with update as time goes by.