Over the course of the last year we lost all but one of our 18 chickens. We always lose a few here and there to foxes or coyotes, maybe one dies here and there from being egg bound, etc., but a mink or ferret (couldn't tell the difference when I trapped it) decimated our flock and killed seven one day then another eight the next day. We have one layer left and she is an older 4 years old hen. We picked up 23 chicks in the spring and they are eight weeks old pullets now. The pullets are in a temporary coop in our barn where normally I keep them there until 15-16 weeks old when I transition them off medicated chick feed and integrate them into the coop where they start on layer feed (with egg shell and grit added). We didn't want our sole adult hen to be alone so she is in the barn with the pullets, but we only put her food out when the pullets are locked in the temp coop (hen doesn't get locked in the temp coop, she has free reign of the barn). I'd like to just put everyone, my remaining hen and the 23 pullets, in my main coop but I would have no way of having separate food (medicated crumbles for the pullets for 7-8 more weeks, and layer feed for the one hen). Can I just fill my feeders with the medicated food and have the adult hen eat that? Or at 8 weeks can I transition my pullets off the medicated chick feed and just give them the layer feed I give my hen? Or is there a feed that is somewhere in the middle? Also, if I migrate my pullets off the medicated chick feed should I be adding oyster shells and grit to their new feed so the one hen gets those additives in her diet? Also, I'm not concerned about getting eggs from my last layer. At age 4 she doesn't lay much anymore anyway. I just want one feed so I can integrate them in the main coop.