My 8 1/2 month old Silkie cockerel died today. I witnessed it and can only conclude it was Sudden Death Syndrome or something similar. All my birds were foraging quietly in the backyard. I was talking to DH in the side yard separated from the back by 4’ chain link fence. I heard a sharp sqwauk and saw Silkie engaged in extreme wing flapping and as I ran over he had collapsed and passed within seconds. There were no other birds near him. No birds were running from anything (predators). Silkie didn’t move while the short burst of wing flapping was going on. He seemed unable to run. I picked his body up immediately and there was no heartbeat. He was gone...just like that. Has this happened to anyone else? Could this be a heart attack? I would like to hear about similar experiences others have had. I will miss my little guy. I will miss his adorable crows.