Because I'm very indecisive and paranoid. Honestly, Nebo doesn't seem to like the food he's on.....he seemed to like the puppy formula, but he's been turning his nose up on the adult food, I don't think he even likes it. He hasn't been eating nearly as much since I switched. Nutro is great stuff, I'm just thinking of trying something different, and the "holistic" appeals to me, lol.