I purchased a GoughNut MAXX for my 100 lb shepherd and his teeth keep getting stuck in the hole. Has anyone else had this problem?

From the owner of GoughNuts:

Leerburg contacted me about your issue with the GoughNut. I am going to put a black goughnut in the mail for you today as I think the Maxx must be too big for your dog. Yes, this has happened before but only a handful of times. It is easily remedied by the correct size for your dogs jaw. I hope this helps.