I have 8 Brahma chicks that are 10 weeks old. I picked them up yesterday and they were thin. I keep chick starter/grower in their coop 24/7. I have been useing ADM feed. Should I change brands? If not what else should I be feeding them. They are in a new coop that other chickens have been in and I haven't turned them outside yet with the other hens so I don't think they are wormy.