This product packaging says it is very tough, and for strong chewers. My dog had this tire for 15 mins, I walked away to put some other items I bought away because I didn't think he would be able to chew it apart according to what they said about it on the package, but he chewed the entire inside rim off in big chunks. I even bought the largest one they had. I went online and read many reviews from others who had this same experience with this product. I emailed the company, sent pics, and the receipt and they refunded my money. Still, I was very worried about my dog getting sick from the rubber, or having him get a clogged intestine... Not a durable product at all.