We have a 5 month old Black Sex Link who has been lethargic for the last 2-3 days, with one eye that she keeps closed or is swollen shut. Yesterday I noticed some lumps on her face when I was trying to figure out what was wrong with her. I'm not sure if they are normal or not (I don't remember seeing them when she was well, but maybe I wasn't looking closely then!). Her whole face does seem really pale. This morning she has diarrhea. Yesterday she ate some scrambled eggs and was drinking some water, but she seems to be going downhill rather fast. We have also given her some yogurt. She is isolated for now with water and feed, but she is hunkered down and not moving much. I've tried searching her symptoms on this forum, but her symptoms are pretty generic so I don't feel like I've found anything that it could be. This is our first time raising chickens and we're really not sure what to do to help her. Would a chicken antibiotic be appropriate, even though we're not sure what the problem is? Here's a picture of the lumps on her face: Any ideas would be much appreciated!