What is the difference between puppy food and adult dog food Puppy food has a higher amino acid content than adult dog food. As your dog’s legs get longer, muscles get stronger, brains get bigger and bodies get stronger, there must be enough amino acids to ensure their development. Puppy food has a higher fat content than adult food, and these will allow puppies to develop properly. As weight gain slows down, their need for high energy is reduced. The mineral content of puppy food is higher than that of adult food, and calcium and phosphorus are two extremely important elements for a growing dog. According to AAFCO, puppy food needs to contain 1.2% calcium, while adult dogs only need 0.5% calcium.
