My doggie has threw up four times today, he is only 6 pounds, he is usually hyper, playing and eating. All day he has just been resting and refusing all food, he just seems like he doesn't feel good. It was like 6 hours since he had vomitied but I offered some water because I'm scared of him get dehydrated being so little and 5 min later he threw up a little more. Should I be worried? Anything I can do?

