I hatched 3 ducklings June 25. They’ve been on manna pro duckling/gosling starter. I noticed about 6 days ago my pekin/khaki cross is sitting a lot. On hocks. I order niacin and brewers yeast. I’ve added to water, feed as per instructions on this site… but I see little improvement?? How long will it take before I know if it’s not going to help? I’m so sad for him.. “ Monet” has become my fav.. he’s just so calm, and actually likes to be petted. Any thoughts, ideas or help out there… Greatly Appreciated!!!