Hi, I'm new to the site and to chickens. We bought 5 chicks 3-4wks old about 3 weeks ago, after one week one of them got severally lethargic, stopped eating, would just fall asleep in the backyard, she died within 24hrs of these symptoms. The other 4 seemed fine but now 2 weeks later another one is starting to act lethargic/sleepy and her eyes seem watery, it's not as bad as the other one, she will still run after the others but seems a bit slower. I have no idea what to do or if it's normal? Could she just be a more mellow hen? Thanks!