I have 9 hens and one rooster. One of the hens, a two-year old Buff Orpington is sick or injured, but I don't know which or what is wrong. Symptoms follow. shakes her head as if to clear the cobwebs listless weak, walks slowly, can't get on roost passed out yesterday, appeared dead, but revived when picked up; no sign of injury comb seems a darker red color than usual will still eat and drink weight loss Non of the rest of the flock show any symptoms. Thanks.