My daughter's Boston terrier had to go to the emergency vet last evening after a day of restlessness, vomiting and just not acting like himself. Turns out, long story short, he had a chunk of Nylabone in his stomach which was not allowing any food, even water, to pass into the intestine. He had surgery during the night and if he can keep food down today, will come home tomorrow. They tell you these bones are digestible but this is not our first problem with them and there will be no Nylabones in any of our dogs futures. Be warned! Poor Boo Boo!