PLEASE help me if you can. One by one I am losing my Pekin flock. A duck acts as though its legs are too weak to hold him. He/she doesn't stand up, but scoots around if he/she has to move. Within a week, the duck is dead. I am wondering if the feed I am giving them is the culprit. We grind 3000 lbs corn with 800 lbs wheat and use it as a general feed for chickens, geese, pigeons, ducks, etc. The ducks seem to be the only ones with the problem. Thanks in advance.