My 4-Hers have golden sexlinks, black sexlinks, and red sexlinks, that they get through the Chick Chain each year. They have has as many as 60 birds. They have 47 right now. They sell the eggs and this money is used for spending as well as college/"flying the coop" savings. A year ago we started losing birds unexpectedly. They have a guardian dog, so they have never lost chickens to predators. This is unusual around here. Everyone else we know loses their chickens to predators before they reach "old age". She is a really amazing dog. (Great Pyrenees, for anyone interested.) So when they noticed a sick bird and then she died it was unexpected, for sure. Then a few days later another. We had that chicken tested for parasite and bacteria at the local vet. He couldn't find anything and so he sent her to the state lab for testing. They returned results of infection in the vent and broken egg. The next two birds came back with the same results and we were told it was reproductive organ failure due to the birds aging and laying an egg every single day. These egg production birds tend to wear out early, we were told. We lost 5 chickens total. We had always fed them either co-op layer pellets or DuMOR layer pellets and offered calcium or oyster shell on the side. Sometimes we mixed it into their food. We also felt that the eggs still had thinner shells than store bought eggs no matter how we tried to remedy it. So, we took the plunge and switched to the Purina layena pellets with Omega 3. We are so happy we switched. We haven't lost a single bird since. That was 9 months ago. I wish I had known there was a 30 day challenge. I did the 30 day challenge when Purina came out with Purina One Smart Blend for Seniors dog food. My senior house dog (lab mix) went from acting too old to move much to acting like a puppy. It was a good food for him. We don't use Purina for our livestock guardian dog. We use Victor High Performance for her. This is better for her, as a working dog. But we do love Purina, products overall. And I am glad to have the ability to share our experience, and satisfaction with this food.