I have a brooder set up for a few day old turkey and some week old ducklings that I hatched. They were all doing absolutely amazing and I went to refill their waterer and about an hour later I have four ducklings and a turkey poult flailing around suddenly and rearing their head backs. The ones that are no longer flailing are extremely lethargic. I don’t know what’s happening. All I gave them was plain water and no they’re suddenly dying