I have seven healthy ducks that I take great care in and do everything I can to keep them healthy. One of my Appleyard girls died right before my eyes in a matter of seconds. She acted as if her neck was broken but that was not the case. Happy and healthy enjoying life with the rest of the flock one minute and dead the next? Never have I experianced anything like this before? She was only a year and a half old. My guess is she had a heart attack or stroke but find that to be odd at such a young age.