I've lost 4 ducks and have no idea why. They go from looking great and being active to limping on one leg then lose complete use of one leg and begin to pant. Then they die the next day. Healthy. Limping. Loss of Leg use/panting often. Dead. I need help! The vets here have no idea whats going on, they don't bother with birds. I thought maybe a disease but my chickens and geese are showing no signs of illness and they were exposed to the ducks. I then thought poisoning but I have moved the ducks and there is nothing for them to eat that would make them ill and a new one is showing symptoms every day, as soon as one dies another seems to start showing signs and then dies. I am keeping their food and water sparkling clean (Clean standards not duck clean standards) and there is nothing rotten that they can get a hold of and the ground is dry, So botulism is unlikely (I think). It could be a deficiency of some kind but I don't know if that fits either. I don't want to lose all my birds.