Hello! I am new to BYC but check these forums constantly for clues to this mystery disease spreading through my flock. Unfortunately, I still have no idea what it is! I used to have 5 hens, and all was well. We got 10 babies, they grew up, and all was fine. We got 4 new baby bantam cochins, and shortly after, 15 broilers, and all was fine. Then I foolishly introduced two new grown flocks to my flock and all hello broke loose! It started with me finding one of my newer girls dead in the run with my small bantam cochins. Hoping she had just accidentally eaten a tomato plant leaf, I didnt think too much about it. I got rid of the tomato plant and everything seemed fine. Then a few days later, another dead bird, and a week after that, another one! I had noticed that one of the meat birds was honking/sneezing. I know chickens dont honk, but thats kind of what it sounded like. She was also gasping for air, and I thought it was because she was a pleasantly was over plump girl, or could possibly have gape worm. She went to the palace in the sky the next day as I didnt want to see her suffer anymore. Since then, every day one or two chickens is affected by the sneeze/honk/squeak attack, then the next day, they're fine but a new one has it. We have also noticed quite a bit of diarrhea that ranged from light brown to clear/white, but also a ton of normal stools too. We have 41 chickens in total so I keep waiting for it to run its course through the flock hoping its just a cold. I have given them Wazine for worms, and treated with Sulmet for cocci and (in case) coryza. None of this has seemed to help. Then the oddest thing started happening...I found a "floppy broiler" and immediately suspected Marek's. I separated that broiler for a few days and then it was fine! A week later, we found another chicken dead. Then, a few weeks later, the same broiler went floppy again. Separated her and she was fine a few days later. Then one of my layers couldnt stand up, and was leaning to the side. Acted perfectly normal with regards to eating and drinking, seemed very alert, and a few days in isolation helped her recover perfectly. Now this has happened to several other birds and I have one in my bathroom right now who is showing the worst signs I have seen so far. She's my favorite so I am REALLY desperate to figure out what this could be. Her signs were: Listless, Fluffed out, droopy, and had a speck of blood in her very whitish diarrhea. There was barely any fecal matter, only urate. I started giving her Sulmet in case it was coccidiosis and she perked up and all was fine. The blood disappeared but the diarrhea remained. Only a little bit of fecal matter was coming out, and it was mostly urate. She was eating and drinking and acting completely normal until a few hours ago when she went down hill fast. Thinking she was just stopped up or maybe egg bound, I put her in a warm bath and squirted a little bit of KY in her vent. None of this seemed to help. If there is anyone who has experienced something similar to this and found the answer/cure, PLEASE let me know. I am desperate to save my little girl.