I have four girls, two started laying two weeks ago, ( one barred , one buff) I am getting two eggs a day. How long should they sit in the nest box? it seemed like the barred sat for an hour today, the buff at least thirty minutes. How many eggs a day should I get from 2 barred rocks and 2 buffs? the eggs I am getting from the two I know are laying are now nice, meduim sized eggs.