I have an Orpington hen almost 2 years old. Last spring she got what seemed like a cold, puffy eyes, coughing, mouth breathing. No bad smell though She seemed to feel ok, eating well. I took her to vet, he gave her a couple of shots and wormed her. I had 2 others that never got sick. She recovered and has been fine. She started moulting, not a severe moult. She has symptoms again. I have gotten 2 more orpingtons over the summer so I now have a total of 5 hens. From looking up symptoms I think it is coryza. I can't afford the vet right now. Can I get antibiotics at Tractor Supply? Any opinions as to the best one?