Energy is made with only 3 natural food grade ingredients whole milk, whey protein, and casein (the curds). Whey protein is one of the primary proteins found in dairy products. A by product of the cheese making process, whey protein provides substantial amounts of the essential amino acids that are needed to carry out the functions that proteins perform in the body. The body cant produce nine essential amino acids. These amino acids have to be ingested by eating foods that contain them. Developed to naturally increase fat and protein levels for lactating bitches, puppies, and kittens. Boost energy levels for performance dogs or active dogs. Known to boost the immune system and build antibodies in puppies and kittens.