They are having all the signs of being poisoned. I just gave them apple cider vinegar to help it. We are going to get it tested.
Fish Prime?!?!? As in tap water conditioner for aquariums?!?!
Yes, you’re probably right, they are most likely poisoned... because you’re most likely adding the poison!
Why are you adding the prime?? What’s wrong with tap water, that’s what everyone uses for their farm animals. Where did you get the idea that you could add aquarium chemicals to your ducks’ drinking water? I’m almost positive that all of those bottles regardless of the brand have warning labels stating they’re for fish tank use only and not for drinking water, and probably directions in case of ingestion...