My OEBD has been on Nutro Puppy for the last 4 months and he is doing very well gaining weight, nice coat, etc. But lately he has started to look at his food longer and not wanting to eat it until he gets really hungry. I think he is getting used to the treats he is getting during Training Class - and now does not like the taste of the dog food. So do any of you change up dog food to give your dog a different taste? I was thinking of giving him Royal Canine Bulldog just to switch is up, but was worried about stomach issues (diarrhea, etc). Any of you add anything to existing food to make it more tasty for them?