I have 4 WH ducklings that are almost 5 weeks old, my first ducks. I'm concerned about one that lays down a lot. She doesn't seem to have any trouble walking, eating, or swimming. Her feathers look good and her nares and eyes are clear. Her legs look the same as the others but I've included pictures in case a more experienced eye can spot something. I gave them all electrolytes in the water. I split a package over two days. It didn't seem to make much of a difference. I have more but I'm not sure how often to give it. I suspect that she might be more sensitive to nutritional levels. They were receiving chick starter with Brewers yeast. I'm starting to slowly change them over to Purina flock raiser. I have added roller oats to reduce the protien and Brewers yeast to boost niacin. So here's my questions. Has anyone experienced this? What did you do? Is there anything else I can do for her?