Cow Creek has done the most recent research on this and hopefully he will chime in here soon and give you everything you need to know. I will try and give you the down and dirty but talk to CCG to get all the updated stuff.we have changed the food, that gave no result...the vitamins I am still adding to their food and water, what is aflatoxin poisoning?
This year because of the heat and drought in most of the growing belt of this country and Canada, the corn and some of the other grains were hit with a mold. This, in high amounts can kill our birds especially ducks. It can also cause crippling, sometimes permanent, neurological issues, again sometimes permanent, and even death if the concentrations are high enough. Is this what is causing your problems? I don't know. It could be or it could also be a contributing factor to something else. That is why I suggested changing feed and will go so far as to say feed companies. If you're using Purina now, change to Blue Seal or whatever the case may be. Just switch the food to a feed that is high quality and the main ingredient isn't corn. That is the safest bet. Corn was hit the hardest, but so was some of the rye crop and the wheat also has some issues. I don't have the answers, I wish I did.