The Next Best Thing to Mom! Puppies grow healthiest and best on mother's milk! Science has decoded the immunity and growth secrets in canine milk to reveal over 1,000 bioactive properties. Animal Naturals K9 Puppy Gold recreates canine mother's milk to promote immunity, stronger joints and lean puppy growth. The Swiss Army Knife of Puppy Nutrition! Animal Naturals K9 Puppy Gold contains canine milk's bioactive proteins, micellar casein, colostrum and more to give a giant head start in life. We even include canine milk's awesome immune factors, including lacto-ferrin. Animal Naturals K9 Puppy Gold helps produce not just healthier puppies, but healthier, longer living adults.