Sorry if this seems repetitive, but all the other posts I've read, seem to be about younger birds and/or non-duck related. We were given three Pekins over a month ago, to add to our flock. They are about two years old and were seemingly healthy. Yesterday at feeding time one was trying to walk but kept falling over. We checked her out and she looks fine. No cuts or swelling. The legs don't go out to the side like spraddled legs would. If anything, the sometimes point straight back, as if she were trying to be superman. I also don't think spraddled leg would show up this late in her life. I'm wondering if it's a deficiency. I did gradually change them over to what we feed everybody else, which is Blue Seal layer pellets. And that has been working well for everybody else. I'm wondering if it may be a sprain, because there is one Muscovy that is pretty bossy and chases them around. Maybe she tripped on something. Or perhaps it's something genetic like "Weak Legs". If so, can it be corrected? She is separated right now, and stands in her holding, but walking isn't an option right now.