Is there a big difference? Hennies are 18 (or 19?) wks old tomorrow and they're out of food. I figure it's time to start giving them layer feed... right? I live in NJ and it's already 38 deg. at night and high 60s in the day. I'm wondering when I need to start covering the run and insulating the coop with hay. They nest "upstairs" with a wire floor. The floor has a tarp that goes over it and I'm going to put some hay on top of that. But do I need to do it NOW? I have 9 hens in a Henspa that says it accomodates 8. Don't yell! I ordered 8 chicks and they sent 9!! I'm not complaining.