I debated about this toy as I am always looking for something that will keep my lab busy for more than 5 seconds before he destoys his new toy. I have the large one and he will chew on it often (with or without a new Gnawhide). He carries it around and teases his smaller brother but I have caught them laying near each other and both chewing on it at the same time. The only issue I have is that it can be difficult to find refills. I do not regret this purchase at all!
They didn't do anything with this. It was so heavy. They didn't find anything interesting to do with this. Don't waste your money. I would have been better off with a toy they could destroy. They just didn't play with this at all.