Blue Buffalo BLUE Freedom Grain-Free Chicken Recipe for Puppies. Some puppies just dont do well with grain-based foods. Thats why we created BLUE Freedom dry food for puppies. BLUE Freedom contains no grains, so it has no glutens. Glutens are known to trigger allergic reactions in some puppies. BLUE Freedom. If you’re considering a grain-free diet for your dog, there’s nothing better than BLUE Freedom. Whether you have a puppy, large breed, small breed or adult dog, we’ve got a BLUE Freedom recipe for you!