I am from Northern Wisconsin and have7 pullets that are 20 weeks old. No eggs yet. I know its JUST 20 weeks, but????? I have 2 buff O's, 2 Barred rocks, 2 white rocks and 1 red star. Could it be our climate, and light? We have their light on a timer that comes on at 4:00 am and goes off at 8:00 am. Anyone else??????