Coryza presents a foul odor around the head area along with facial swelling and respiratory symptoms. Treatment is an antibiotic such as Tylan or Baytril in conjunction with a sulfa drug.Hello, I know this is old, but I believe we are battling the same thing in our flock. I click your link but I could not find the treatment course that was recommended. Any help would be really greatly appreciated. Thank you so much!