Kittens need the content composition of queen’s milk or a quality kitten milk replacer to meet their specific nutritional requirements to grow and thrive. The NKC Milk Content Comparison Chart compares the percentage of fluid, fat, protein and lactose, the milligrams per 100 milliliters of calcium and phosphorus and metabolizable energy in kilocalories per 100 milliliters in the milk of four animals: dog, cat, cow and goat.