I would agree that it's an individual chicken thing, as well as hazard a guess that theres an environmental aspect as well (aside from hours of light, which we all know.) I still think though, that there are some breeds that tend to be earlier or later than others on average. It also seems that...
I've been trying to find somewhere a list of various chicken breeds with when one can reasonably expect the average hen to lay. I have 8 hens that are seven different breeds ("Ameraucana"/EE, Welsummer, Polish, SS, Barnevelder, BLRW and a Belgian d'Uccle.) My understanding is that they tend to...