Wouldn't it be so much easier if the major food makers would just up their protein to 18-20%?? I have struggled with this problem since 1993. The original reason I got chickens was because I read an article about them in Organic Gardening. They recommended 21% layer mash and some scratch treats. Back then there was one place I could get 21% layer pellets! I used a local mill for many years that only had 16%, but it had animal protein, so they did pretty well. After a 2 year break in the early 2000s, I got chickens again and fed Purina. Without the animal protein and only 16%, I have had problems off and on. Presently feed 19% Purina Gamebird Flight Conditioner, but if the feed store doesn't get some 20% Gamebird Layer/Breeder in the spring, I will have to go somewhere else. Feed producers say to give them only layer feed, but that is just no fun. I think they need variety. JMHO.