I have 2 1 1/2 year old RIR hens, 1 18 week old RIR hen, 2 15 week old RIR hens, and 1 15 week old RIR Roo. 6 chickens in all. Is starter crumbles alright for all 6 right now. What else, other than fresh greens, do they need. New to this. Just got the 2 older hens, ready to lay. Thanks leilani.