I'm a wildlife biologist and former farm girl, so the health of the animals that I work with is always very important to my. When I started raising backyard chickens, in was a no brainer to use a Purina product. Purina is a brand that I trust completely - when I was raising endangered rabbits for release into the wild, the best formulated and most reliable feed I could find was Purina Professional Rabbit Chow (it literally helped save an endangered species!). I have always used Purina, so with my chickens I started with the Purina Layena crumbles. My girls love their food, and I love that they are healthy, happy chickens. The Oyster Strong System makes me confident that I can feed my girls and they will produce quality, strong eggs without the need to supplement them with something else. Thank you for once again making an animal feed that meets the high standards and expectations that I have for my animals!