Oh no Please try not to worry too much I know its easy to say and hard to do. There are a lot of sicknesses that could be getting him down right now, so don't suspect the worst. It is good to be prepared for the worst, but keep hoping for the best. My last set of foster puppies got REALLY sick and I thought they were both going to die. They were showing exact symptoms of parvo, but it turned out to just be worms. So sometimes really minor things can make them look really sick. I pray that whatever is wrong with Popeye can be fixed. (((HUGS)))