Protein Puffs are an extraordinary combination of health, taste, and texture all in a cat-sized reward. With protein derived from human-grade caseinate commonly used in common health supplements, snacks, and protein bars, Protein Puffs are packed with 75 percent, containing a bountiful amount of essential amino acids, and completely free from sugar, grains, and anything artificial. But these treats— baked to a crunchy perfection— are much more palatable than your own protein bars thanks to ingredients like chicken liver and natural flavoring.