Regarding feed with animal protein - I like the Kent feed, and I also really like Buckeye brand "layer/breeder pellets" - it has a bit higher protein than Purina, and has animal protein in it.
I also use a mix of Cod Liver Oil, Red Cell, and Fortified Wheat Germ Oil (1:1:4) in a spray bottle, and I sprits 1 or 2 full sprays on a pan of layer pellets each morning during breeding season. I found, after starting this, that my stock feathered out more quickly after molting, have a nice sheen to their feathers, and most importantly for me, hatchability increased.
I also use a mix of Cod Liver Oil, Red Cell, and Fortified Wheat Germ Oil (1:1:4) in a spray bottle, and I sprits 1 or 2 full sprays on a pan of layer pellets each morning during breeding season. I found, after starting this, that my stock feathered out more quickly after molting, have a nice sheen to their feathers, and most importantly for me, hatchability increased.