Does anything like this exist? What I mean is a reference that tells the average age at which each breed starts laying. I'm reading here this morning a RIR started at 24 weeks - isn't that late? Some other breeds start at 16 weeks - isn't that early? I've got the five breeds listed in my sig and I'm curious, they're 13.5 weeks old now - do I have 11 weeks to go, or only 3, on average?