One chicken got half its head swollen.it died.the rest are all breathing very loud very gurgly treated 2 days with sodium sulfamethazine 20ml/gal water.then ran out and its not sold in my town so have to make a long trip.before i do i thought id ask her for more suggestions. 3 died in the past 12hrs. One dosent seem able to stretch her legs out.just sits.yesterday she was ok.no other chickens seem to be having leg problems.down to a couple eggs a day(from about 80 birds) it dropped very quickly.might also be from sudden lower light conditions.any recomendations on what i should get for them? I dont have a lot of money to buy a ton of meds.should i do sulmet again? Maybe combine sulmet with something else? Any ideas on cost(im in bc)?