I don't look at so much the health guarantee but the health testing that has been done on the dogs, the answers I get from asking questions, how old their dogs are. I remember the first time, I talked to Ivans breeder and asked her if any of her dogs had had seizures or epilepsy. Her response is what convinced me I wanted a dog from her. She told me at this point in time(15 years of breeding) she had not had a puppy or dog come down with that. BUT she could not guarantee it wouldn't happen, same with stones. I wasn't worried about stones, at that point didn't care, I just wanted a seizure free dog that would get to live beyond its 4th birthday.