I have two call ducks with some sort of sinitus? And need advice on how to treat them. I purchased them from a breeder last November 2012. At that time one had very minor swelling of the sinuses I was told that it was from not having enough fresh water and that in time it would clear up on its own and not use antibiotics to treat it. A month went by and I decided to try Tylan50 water soluble to treat any infection with no success. After that did not work I waited a period of time and had the mucous tested for different strains of bacteria such a mycoplasma all results were negative except for growth of e-coli which was most likely due to a contaminated sample of snot. After those results I treated them with .10cc of Baytril Sub Q and repeated that dose 4 days later. The Baytril did help improve the infection the swelling went down quite a bit but they still have swollen sinuses and discharge. Does anyone know what the next step would be? A higher dosage or a different antibiotic? Someone suggested flushing with hydrogen peroxide? I am starting to wonder if they will ever get rid of this junk, I would greatly apprectiate any insight.