I have nine Leghorns and 25 Barred Rocks that are nine weeks old this week. I was told to switch them from chick starter feed to regular layer feed after they start laying. Sounds simple enough but then it dawned on me today that the Leghorns will start laying at around four months and the Barred Rocks at around six. So how would you handle this? I can't put the Leghorns on layer feed and leave the BR's on starter since they're all housed together and I haven't taught 'em to read yet to know which is which. Absent any new info I'm thinking to leave them on the chick starter until I start seeing white and brown eggs, but after seeing the leghorn eggs first maybe I'll put out a separate dish of oyster shell. Any info would be greatly appreciated.