Yesterday I went out to put my chickens away at about 8 PM, and found my rooster lying dead on his back next to the fence. I had checked on them at about 5:30 and he was totally fine. The hens were all fine. His body had no blood or other signs of a predator. He was probably between 2 and 4 years old. I really don't know what happened - poisoning? stroke? seizure? heart attack?