NUTRO NATURAL CHOICE Large Breed Puppy Pasture-Fed Lamb & Rice Recipe Dog Food always starts with pasture-fed lamb and is made with high-quality nutrients like glucosamine and chondroitin. This dog food contains calcium to build strong bones and joints and omega 3 fatty acids like DHA to support the growth and development needs of your large breed puppy.. NUTRO Food for Dogs always follows the THE NUTRO FEED CLEAN philosophy, is always made with Non-GMO* Ingredients and contains no artificial flavors, colors or preservatives. *Trace amounts of genetically modified material may be present due to potential cross contact during manufacturing.