I have a 13 week old Yorkie/Bishon mix. We've only had him for two weeks. The first week, he seemed fine. The second week, he seemed more sleepy and showed slight signs of loss of balance. Two days ago, he began to shake uncontrollably and he had trouble standing on his hind legs. He appeared to be drunk when he walked. He's seen 3 vets. One said he had luxating patella in both hind legs. The other two thought he may have been injured or possibly be showing signs of cerebellar ataxia. A blood panel was done to rule out hypoglycemia and liver shunt. I have kept him quiet in his kennel for 24 hrs. and will continue to do so to see if he shows improvement. He is taking prevacox for pain. His shaking has diminished and he seems to have slightly more control of his hind legs, but his head continues to wobble. I am very worried about our new little puppy and feel unsure what steps to take next. Our breeder has a genetic warranty, but only if we return the puppy. If we return him, they will euthanize him. If we keep him, I suspect the diagnosis and treatment would be cost-prohibitive. How is this disease diagnosed? What are the costs involved and what kind of life would the dog have without treatment?