Alrighty.. being the stubborn RI-born girl that I am, put a very thin layer of hay in my coop after cleaning out the rest of the shavings. Two days later, I am pretty disgusted at the state of the coop floor around where I place the waterer at night... ya'll are right. Back to shavings as soon as I run out of hay! The newest dilemma: I think I might have ALL pullets and no roos. Darn. Is there a way to tell at 4 weeks old?