my chickens are going to be 3 months old this weekend, and i've read they should start laying @ 4 months, so i was wondering what to look for that might tell me they are getting ready to start cranking out eggs. the nest boxes are up in the coop, but covered, and i want to make sure i uncover them at the right time (not too early so they don't get in the habit of sleeping and pooping in them, and not to late so they start laying eggs on the floor). what kind of signs should i be looking for? will the rooster start behaving differently too? this is my first flock, so i don't know what to expect. thanx for the info.