Okay so it's our first time getting backyard chickens and we've already just recently lost one to avian pox. They're all about a month and a half old and since we put the last one down I've been keeping a close eye on the others to see if theyve contracted the illness. They've seemed to be doing fine, until today when I was letting them out and I noticed one of them had a foamy eye. She's been acting completely fine and she doesn't seem to be sick at all, she's eating and drinking as normal and is just as spritely as ever. I've done some research and what I've found is either infectious bronchitis or MG. I've attached some pictures of the sick side of her face. I have her quarantined from the others just in case and I really don't want to lose another, so if you know anything please let me know! Update: I've spent some time with her alone and I'm noticing her breathing is fast and kind of noisy. She also keeps opening her mouth as if she can't breath very well.