Get Your Dog Care Questions Answered by Experts
How many times per day does he vomit?
How many times per day does he have diarrhea?
What is his normal food?
What does he eat for treats?
Now that I am thinking of it, he has been lying around more than usual but I guess that would be the case if you were experiencing his symptoms. He also seems a bit thin to me. Very bony feeling when I pet him.
I would be most suspicious that he may have a case of pancreatitis. Your vet can check for this with a quick blood test. The primary symptoms of this are vomiting, diarrhea, and poor appetite. With his age, other possibilties exist, too, and I would definitely get him in to your vet for a pancreatitis test and exam. If it is pancreatitis, he will need hospitalization for a couple days and IV fluids to resolve the problem.
Let me know if you have more questions,