a 50# bag of layer goes bad before its even 1/2 empty so I'm giving all my chicks and chickens starter that comes in 25# bags. Of course I'm giving oyster shell too. Since I only have 19 chickens and chicks, the smaller bags get eaten faster before it gets overcome with bugs or moisture. A 50# bag can last me at least 6 months....forget that!! I feel its bad after 3 months. The protein is higher but all mine free range so they just eat in the morning before I let them out. So far, so good.