| Its not unusual for a dog to lick up its own vomit. What concerns me is that he has vomitted twice today and you say he is skinny. You need to have a vet check him over for you. A forum is a general discussion place, but when it comes to a sick dog, the place to go is to a vet. I wouldn't leave it too long either especially if he continues to vomit. You didn't mention if he is active, bright, eating, whatever, but in a way that almost doesn't matter just now. If he is vomitting and thin, let a vet check him out and discuss the problem with you. | 
