Indian Runner while standing straight up wobbles front to back and tucks tail between legs. Does NOT wobble when running, walking fast or foraging at all. 8 months old. We got her and 3 others 2.5 months ago to add to our flock. She wobbled the entire 4 weeks while in quarantine and still does to this day. I supplemented niacin in the water and brewers yeast in the food while in quarantine just incase and a few days of electrolytes and vitamins. Feet, eyes, nares all looked good. Good body weight, and she eats and drinks great. No abnormal poo noticed. 1-3 eggs per day from the 4 of them. I was a little worried that she would have a hard time keeping up with the other ducks when released to free range but she doesn't. She is a little slower getting into and out of the pond and lags behind a little when they all start running full speed. I'm guessing that she just is what she is but if anyone has any suggestions on how to help her be 100%? or knows what might have caused it, I'm curious. Genetics? Early life niacin deficiency that can't be fixed now? Should I continue to supplement with niacin just in case?