Learning Through Parvo - When I found a puppy on the corner, I did not know what sort of dog he was. He was cute but very sick, so I left him with my vet that Friday afternoon (Dec. 1, 2006) in an effort to beat the parvovirus he had. We got him back on Monday afternoon and started on a program of feeding him up, as he was a bit boney. Over the next several days he perked up and started to play with our other three dogs. We began to wonder what sort of dog he was.