One of our pullets was found this evening lethargic & when picked up threw up clear liquid. We immediately quarantined it & noticed it as white runny stools. It had been on medicated chick feed until 8 weeks & then was switched over to Resaca Sun feed local to GA. The wether has been thunderstorms for days now & the babies have been in a sectioned off part of the adult run/coop for 1week now. No other chicks or adults are showing signs of stress. I cleaned out all food/water/bedding in big run as soon as we found this sick one. Other than vitamin water & heat lamp in quarantine, what can I do?