Help with baby ducks

[iron chicken]

I recently got two baby ducks. One is perfectly fine. The other ones legs kind of bow out and it doesn't walk very much. What's wrong?

 

[Pyxis]

Sounds like niacin deficiency. You can treat it by giving them poultry vitamins or Brewer's yeast.

 

[subhanalah]

https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
You may need to tether the legs closer so it doesn't develop splay leg.

 

[Miss Lydia]

Here is some info from Metzers farm blog http://metzerfarms.blogspot.com/2011/03/are-my-ducklings-leg-problems-due-to.html