I have 8 Silkies, and they are 4 months old. I have them on DUMOR FEED STARTER/GROWER. This is what the package says "Complete formula for starting and growing chickens, ducks, geese, turkeys, quail, pheasant and chukar. Designed for chickens, ducks and geese from 0 to 10 weeks of age and turkeys, quail, pheasant and chukar from 6 to 12 weeks of age. Provides essential nutrients for optimum development. Additional vitamins and minerals are not required. Chick starter/grower 20%." The guy at the store said this will help them stay warmer and add fat as opposed to a layer or finisher feed with less protein. They don't look very fat to me.... healthy, but not obese. This chicken feeding thing is much more complicated then I thought it would be. Obviously they are my pets and I would like them to be healthy with plenty of fat to sustain them through out the winter......So... stay the same, or go with more protein, or less??? Also 6 of my 8 babies are roosters if that makes a difference on feed.