I don't know what Parvo is so I really can't say much. But I sure hope he gets better! Last August when I was "babysitting" Oscar for a week in St. Louis, he got sick!! It was HORRIBLE because it was just my mom, my sister and I. He was throwing up and I was so worried. He has to take pills every night because he has epilepsy I think. I was so worried because that night he wouldnt' take the pills. He turned out to be okay though, I think it was just something he ate. I was awfully worried though, it wasn't even my dog, and I felt like it was all my fault! But I really hope your dog gets better, I'll pray for him.