I can tell you that your vet can’t know that the ear infections are from gluten. He may be right, but he can’t know that, only guess. My dog got ear infections from tomato, but it took amost a year and a half to figure that out.
NutriSource has more foods that are suitable for puppies than just their puppy food. All Life Stages foods are in essense puppy foods since that is the AAFCO profile they are designed to fit into. You might want to look at Natural Balance too.
And yes, it is a lot of trial and error. I’ve been working on finding different foods my dog can eat for a little over 1 1/2 years, so far I have a few formulas from 3 different brands that he can handle, and one of those brands I’d rather not feed. Fortunately I have other dogs who can eat the rejects without issues.
