This is NOT an emergency... I have no hens with this problem right now but have had 3 with this and had to be put down... sooo, I would like to avoid this ever again if I can. It starts with stumbling and not being able to walk very well (weakness)... progresses to legs paralized, stiff and out front and sitting on their butts. Legs can be moved by me so are not locked but appear so as they sit. They continue to eat and drink but only when I move the food/water close enough. Also, this did not happen at the same time, so I don't believe it was "caught" by one from the other? All have been young Seabrights (under a year)... could this be a genetic thing?