Any advise would be great. I have a flock of 7 hens that I got 2 weeks ago. We love them and we have had 3 eggs so far. They have a nice warm enclosure at night attached to a good size run in the day. We have 2 Buffs, 2 RIR, 2 Easter eggers and one Barred rock. 2 days ago one buff just began to act lethargic, lay her head on her wing and not move when I went to pick her up. They all free range under supervision and she walked around yesterday and pecked at the ground but still was not feeling well. We brought her inside last night in her own cage with food and water which she didn't eat or drink that I could see. I was going to get medicine this morning and found her passed away.... Very upsetting. The other birds are fine with no symptoms. The other Buff I saw this morning has a watery eye and some nasal discharge. Please any advise is welcome. Thanks in advance.