When the chicks are done with the medicated starter feed what do I feed them until they are ready to lay eggs. And do I start the layer feed before the eggs or when they first start to lay the eggs. Is one brand of chick food better than the other. I looked on the TSS website and seen 2 brands- Manna, and Purina. Also I have seen posts about the protein % in the feed, What should the protein % be for chickens.