We have 9 ducks and I noticed today that one of our Welsh is not wanting to move at all. They are not tame. When I walked into their house today, she was laying in the corner. I walked up to her and was able to pick her up and look her over without her even trying to get away. She didn't even move. We live in the mountains so the weather has changed a bit in the past few days and the co-op we were buying our feed from canceled. So, we have had to change feed within the past month. We now feed an organic feed from the store. All the other ducks seem to be fine and are still laying but she hasn't laid for the past 2 days. Her eyes are also not as wide as the others. I can tell she is not well but I don't know what is wrong with her. Also, this morning when when she walked out into her open area, she had a white mucus looking stuff coming out of her. Just a small amount. Any suggestions as to what could be wrong?