Hello, My flock has what I believe to be mycoplasma so I ordered some Denagard and it arrived today. Everyone has a sneeze, now some are coughing and three have rattly breathing. It's been going on for a while, but has gotten worse the past week, hense the purchase. I added 16 cc of 12.5% Denagard to 1 gallon of water and filled everyone's water. We have 4 coops. The last coop had only one rooster who was to be a meat rooster, but I wasn't sure when I would cull him, so I treated him too. He got the last of the second gallon of water. He started drinking the water right away and seemed very thirsty. He also didn't run to his feed like he normally does. Everyone drank their water. I came back to grab two to other meat roosters to cull when I heard shuffling coming from the singular rooster's coop. He was unfortunately in the very final movements of death. Time elapsed between drinking the water and death was about 30-45 minutes. Everyone else is completely fine ( 7 laying hens, two breeder roos and 6 meat roos ), about 7 hours have gone by since I filled the bowls. I have no idea what happened. The only thing I can think of is the Denagard, but everyone is just dandy. He had a sneeze and a slight cough. I did process his coop-mate a few days ago, whitheld food for 24 hours prior and noticed during processing that his crop was very full. Thoughts?