Your dog could be like a pit bull my husband and I had. He was old (around 10 years when we got him) and his system could not handle the bones as they were too rich for him to digest properly. We didnt give him any bones although he did get into some deer bones that I had put up on the counter for my 1/2 pit bull and her pup,while we were gone (he was a house dog even at 112 pounds). Have your vet check her for an allergy to bone meal