Best-in-class nutrition and big-time taste? Merrick Classic Healthy Grains dry dog food treats your dog to both and more, in easily digestible recipes that balance protein, fruits, vegetables and a healthy blend of whole grainsincluding ancient grains to support optimal digestionand supply high levels of fiber, Omega-3 and 6 fatty acids, glucosamine and chondroitin. Merrick Classic Healthy Grains is best for puppies and adult dogs.