I have a 3 8-10 wk old chicks, one 4 month old pullet, and a Cochin roo. I am not entirely sure of his age. I have read in a few different places that chicks need grower pellets at 10 wks. However, on the back of the naturewise chick starter bag it says to feed chick starter until 16 wks. I have also read that layer feed is terrible for roos because of the high amounts of calcium so flock raiser and oyster shells are better than layer pellets. Any suggestions? Does anyone go from chick starter to grower pellets to layer pellets/flock raiser? Or just chick starter straight to layer/raiser? I'm a bit conflicted and I would like to do the best for my birds. Thanks!