Why neck I call when their heads are flipped back on their back or twitching from side to side.However that's one sick hen.I been away from fowl a while and have good and bad days.When I'm sharp like yesterday but not today .I'm certain someone may shed light and may help you.I had a lot to loose from sickly fowl and culled a lot.Bigger the operation less time you have to deal with some things.However I wish you the best.Prop Toe