Here is a poor video I took this morning with my phone.
Hope this works.
I have a 4 day old duckling that was abandoned in the nest by my house. He can’t stand and does that exact same thing! Now he also has a balding area on the back to right side of his neck. He still seemed very healthy other then not being able to balance in a standing position. I hold him for balance to eat and drink, although he seems to not want to drink water much. Tonight he looked like we might lose him

After reading all this online, I bought niacin capsules 500mg. I opened one but realized I don’t know how much powder to give per meal or how often?? (which is why I came to search online). Am I too late to help him if he didn’t get niacin his first few days of life? My heart is breaking.