My chicks are 17 weeks old (14 or them) and the others in the coop are 3 weeks younger. They are all about the same size except a 10 week old Wheaten Marans cockerel I added. The other Cockerel is 17 weeks old. My question is in preperation for the hens to start laying I switched their food from chick grow to layer feed. WIll this be ok for the cockerels also, as the one is 10-11 weeks old right now. I also give them plenty of grass, weeds and treats daily. The older hens are RIR, White Leghorns (at least thats what I have been told, they were supposed to be RI whites), speckled Sussex, cuckoo Marans and BSL and Langshans. The older cockerel is a cuckoo Marans that is huge and very loud!