Not sure what is wrong specifically, but there's a lot things that could be wrong, so you NEED to take him to the vet ASAP! One of the symptoms of Parvo is repetitive vomiting so you need to have your rot checked w/ a professional as soon as you can! I don't mean to scare you, but it's always better to be safe than sorry in these cases. I hope all is ok & your dog returns to perfect health soon!
