I have been trying to figure out why my birds are dying for a while now. It's not a ton of them, but can be several at one time. It started last year, either sometime in February or March. I lost 5 young guineas about 10 weeks old. They died within the span of a couple days. They were all fine one day, and the next morning 2 were dead. Another one was lethargic and died within a couple hrs. Then the next morning 2 more were acting rather droopy, and they died in a couple hrs. After that, I didn't have anything else to die for quite a while. I've looked all over the web and couldn't find anything like it. Then in the past 6 months, I've lost 3 roosters, 6 hens and a young goose. I caught the 3 silkie hens when they first started getting droopy, and I took them away from the rest of my flock and tried feeding them vitamins and made sure they were warm. 2 died within hrs, like the guineas, but one took almost another week, though I had to force feed her with an eye dropper bc she wouldn't eat on her own. The most recent were a bantam hen, and a orpington pullet. The bantam is still living, but I lost the orpington that night. The other 2 hens I lost, I just found them dead the next morning with no pryor signs of illness. I did notice, in the ones I managed to catch early, they would puff their neck feathers out like they were cold, and I couldn't smooth them down. Now my showgirl hen is getting lumps on her neck, and I'm wondering if it's the same thing. The orpington pullet had a crop full of food, so I know she didn't die from not eating, Thought the others did seem to have a lost of appetite. I'm sorry this is so long, just trying to put out all the information I have. I have search the web over, and asked a lot of people I know that know a lot about chickens and things, but no one has any ideas.