Antibiotics are useless against fowl pox since it's a virus. Antibiotics would only help if there's a secondary bacterial infection. If your birds have wet pox, it will appear as yellow lesions in the mouth, trachea, respiratory tract and death could ensue.
Dry pox on combs, wattles and around the eyes will eventually disappear on their own in about 3-4 weeks. You can put iodine on the lesions to help dry them. Avoid getting iodine in the eyes. Black shoe polish can be used as well. You can put a little neosporin in the birds eyes if the birds have scratched the lesions near the eyes, this will help prevent eye infections.
about half of my flock has Fowlpox. Their combs,eyes have black wart looking things on them. I have 11 hens 2 roo's and a peacock that make up my flock. A few are lethargic so I have them all on antibiotics as of today. Any other advice that my help them? I lost one hen yesterday 
I am keeping a very close eye on them and reading n' learning all I can. This is my very first year keeping fowls. I wanted a goat but decided I have my hands full 
