I got new chickens and already posted issues I had with one (goopy rear, and then breathing raspy after bath) after 2 days she is acting perfectly fine. Anyways, one of my black australorps which Ive had since March 1st (day old chicks) started sneezing a few days later (we also had big storms for a few days right before she got sick), I then noticed a green discharge from her nostils, I went and bought Tetra 10 and started treatment yesterday, I came home today and noticed her eye is swollen shut and she seems a bit droopy, but still alert. I seperated her and told my bf he may need to cull her. I am in the middle of bleaching my coop, and all chicken dishes, removing perch branches and burning them and raking the Pen the best I can. Does anyone know what it may be (google freaked me out) I have DE but havent used it yet since Im not sure if its okay to use while in antibiotics. None of my other chickens seem sick and are acting normal. Should I be prepared to cull my whole flock or is there something I can do? I really dont want to have to kill any of them as my kids and I love having them and until we got these new chickens we have not had any issues since getting them.