I am posting this because I am desperate to discover what killed our beautiful roo. I have scoured the internet, esp. byc, posted questions and visited chatrooms. I called several chicken owners and feed stores. Last week, he turned up with a swollen neck--not crop. It looked like he had swallowed a tennisball and it was lodged just under his beak. It wasn't really hard, or soft. It was solid, but also squishy and did not seem to be filled with liquid. He could not stand with his head up because the weight was heavy. He did not have bad breath and his crop was not swollen. He seemed like he was going to die on Thursday night but after we got some antibiotic/water/gatorade into him, he rallied a little and was able to sleep. Because of the weight on his throat, he did better on his back because the swollen area kind of hung to both sides. He seemed lest listless each time we were able to get some stuff into him but the swelling did not go down at all. Finally, we went to tend him on Saturday morning and his eyes were closed and he was breathing very shallowly. My husband put him down by closing off his air. It didn't take long and he did not struggle. He never opened his eyes. No one seems to have ever seen this happen in a chicken. We wonder, could it have been a snake bite or bee stings? We couldn't find any visible marks--just the swelling. Otherwise he looked fine. Can you give a chicken Benedryl? There were just no answers when we needed them. Can anybody help? Any similar situations?