He is acting ok most of the time..But, yesterday he was like heaving and sounding like he was gonna throw up but didn't! And, he did it again this morning..His appetite is good and runs and plays like normal but have had these 2 episodes yesterday and today! Any ideas what would make him do this? He is 11 weeks old and on Natural Balance sweet potato and vension kibble! He has access to food at all times and also give him the Natural Balance dog biscuits and a little wet! Any thoughts would be highly appreciative!!!