I am having a similar problem. I have had 4 Turkeys die in a matter of a week. They within a days time go from running around the entire yard few to during and droopy and then they have neck control problems or balance issues and are dead by nightfall.
Just lost my lone Narr that hatched. I'm so bummed. Now I will most definitely need more. Could it be a wry neck thing?
I'm pretty sure wry neck is apparent immediately after hatch. :/ I've only had 1 like that, but I knew before it was even time to switch that hatch to the brooder. The other one is doing great now. I added some vitamins to the waterer and haven't had any more problems. I have a new brooder, so was concerned it was something to do with it, but idk. I've never had sooo many issues with hatching and brooding! Driving me crazy!!! An its really only a short walk to get there!!