My kids won chicks at the county fair back in April, so I'm thinking mine are around 18 weeks-ish. We've got a fine looking coop which was supposed to be a tractor *but* is immoveable thanks to the lovely heavy lumber my darling husband used to build it, LOL. They are friendly and fat, and have been confined to the tractor because they were pooping on my back porch, LOL. So I guess it's time to switch to the egg developer feed? And since I've read a few threads here, I'm thinking that maybe they just newly look like roosters because they're about to start laying eggs. How will they know to go into the tractor (if they're out) and nest box for the first time? Anything I need to do? thanks so much for advice--obviously this is our first set of chickens!