I wondered about that Willy but I figured whoever made the tires would deal with that issue. Also, the tire isn't suppose to break apart unless there is a certain amount of force placed upon it. Since I have a big dog, he has less elbow room to get through the tire as opposed to a small dog. I'm glad for the safety issue though.
Rusti EAC, TN-N, TG-O, WV-N, NCC, NJC, CGC, GSD Diva
Jerry Lee AXP, MJP, OAC, TN-N, WV-N, NCC, NJC, SPJ, UAG1