I'm just lost even after reading up on the stuff and I don't know if I got this right but the birds will be carriers and infect any other birds that are brought in? I'm hoping that this doesn't wipe out the whole flock. I've separated the sick birds and disinfected all feeders, coop , waterers etc. I always wear one pair of shoes for the feeding and they are removed at the back porch. I only have Sulmet in there waterer and am changing it daily (x3 days now).I have younger birds that have not been near the chicks that were freeranging together and they were on medicated food from the time I got them home. None of those birds show any signs of illness. Only my older birds seem to have this and I don't think gangrene can top this smell! Snotty noses, most clear but 2 of my roos have like a cheesy discharge from their nose and a wheeze when breathing. Any advice would be greatly appreciated and BTW Merry Christmas everybody!