That does not seem to have sulfa. It looks to have many different antibiotics—erythromycin, oxytetracycline, streptomycin, and colistine (polymixin B) which could treat a wide variety of bacterial infections, especially intestinal diseases and enteritis. But it won’t treat coccidiosis. If your chickens are doing okay at this time, you may not need to treat for coccidiosis. It might be best to just continue what you are doing, and give a small amount of yogurt daily or every other day.