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 grains—including ancient grains to support optimal digestion—and 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. our Classic Healthy Grains dry dog food recipes are supplemented with Taurine and DL-methionine to ensure a balanced diet. Calorie Content: 3,648 kcal/kg or 386 kcal/cup ME (metabolizable energy) on an as-fed basis (calculated).