My cicks are now 16 weeks old and I think they're starting to get some kind of instinct on laying, although no eggs yet. I'm somewhat relieved because I've read that if they lay too early, they may become egg bound, which is not fun to deal with.
My black sex link is supposed to lay any time now, according to the books. She's the largest of the bunch and she goes into the laying box to toss out the fake eggs I have stashed in there.
My red sex link is squatting when I go to pick her up and I've heard that this is a sign of laying to happen soon.
My leghorn and rhode island red are not exhibiting any signs yet.
Yes, I'm very anxious to get our first eggs!!! But I just want them to be physically ready to lay and even if my black sex link starts before the others, I won't be able to put out oyster shells to toughen up her egg shells because it will hurt the others who aren't ready to lay yet.
Also, I'm keeping them all on grower/developer (not layer ration) crumbles until they're all laying, to be safe.