He is very larthargic like he can't get cumfotable, and when I give him water within 5 or 10 minits he has thrown it up, he can't keep anything down. I know the symptoms of parvo but he doesn't have diahrea or anything, and I'm trying to keep high hopes, he is a pit bull who just turned 5 months on the 28th of feb. PLEASE HELP ME:(