Grains are not Public Enemy No. 1, but many people design their diets around avoiding grains and gluten for anti-inflammatory, weight loss and healthy gut reasons. Going grain-free for humans can have positive health benefits, but…what about dogs? Browse the pet food aisle in any grocery store and you’re bound to see several enthusiastic grain-free options. Is this a good thing? Or are pet parents falling for human-centric advertising? We called in an expert for this one.Dr. Katja Lang, DVM, ofHeart of Chelsea Veterinary Groupin New York, had tons to say on the matter.