Hi all. So we have had chickens for several years now and we just got ducklings. We have 5, six week old ducks. They are kept separate from the chickens. They have a generous size run and are out almost the entire day in the yard with our supervision. Yesterday all day they were fine. At 8pm as I was walking them up to their run I noticed Ollie, our blue Swedish, lagging behind 2-3 feet which is so unlike her. I didn’t think too much of it and put them away. Today she is still moving very slow from the pack. I did not see her eat however she is drinking. (They have constant access to drinking water as well as a small pond). I offered her some mini peas which is a favorite for all of them. The others gobbled them from my hands but she turned her head. I want to mention they are on Nature’s Best Organic Duck feed which I was told by the company has the proper niacin for them. The 1 acre they have access to is meticulous and other than grass and landscaping there is nothing she could have gotten into. Just a bit ago I gave her and the others a gallon of water with probiotics/electrolytes. Looking at her there aren’t any physical issues, no weird neck or head movements, no limping etc. Any input would be much appreciated.