Hello all, i just got test results back from zoologix, and to my relief my chickens do not have coryza but they do have ornithobacterium rhinotracheale. Has anybody ever delt with this? I have been researching and it looks like an antibiotic will do the trick. I have been using a powder antibiotic in the water for a week now and seems to help them through. This has been going on for two and a half weeks now. We lost four chickens now out of twenty. It seems to have passed through the whole flock finally. I am thinking of really cleaning the coop super clean and spraying it down on the inside with a bleach and water mixture. Any help would be greatly appreciated.