Hmmm, since another one of your dogs also had something similar, then I would look at the ingredients in the food that you're feeding them. There have also been so many recalls on pet food lately too. In my opinion, Science Diet food isn't good at all even the Veterinary diets. I'm really surprised that none of the vets mentioned that this could be a diet related thing. How is Woofie doing now? Was he put on meds too?