Not sure that my first post went through. I looked and don't see it. : / I have a duck (pekin) that has been gimping. We have been giving them brewer's yeast in their food. Have seen no visible injuries. It has been able to balance itself after a minute or two, get in/out of pool (Supervised), go in/out of duck house with a small ramp, walks around. Today the cat got close to the ducks, through a fence, and the ducks got up and began to walk off. The limping duck tried to get up, fell to its side, and began flailing its legs. Since this time the duck lays mostly on its side, saw it drink once, and scoots if moving at all. I picked the duck up to put it by water, but it tried standing flailing its legs and head /neck shifted left to right. There seems to be no balance what so ever. Is the duck in shock (been a few hours) or is it possible the duck had a stroke or something? The duck is about 4-5 weeks of age.