My Cocker Spaniel had been vomiting, but has since stopped. He only eats a little bit, walks like he's injured or sore all over. Will barely move all day. His eyes get full of yellow fluid (like sleep). He has trouble hearing and possibly seeing. He was fine and acting cheerful about 2 weeks ago. We've called the vet to make a house call. But I'm really worried, he's getting older. Do you think he can be helped? My dog usually crazy about food he goes nuts!