Peachick legs problem

[DukesDucks]

I have 4 peachicks. Two are 4 days old, and two are 3 days old. Three of them are developing well but the other one seems to have a problem with its legs. While it manages to get around, both legs are splayed outwards. Could this be a niacin deficiency? I would appreciate any suggestions for treatment.

 

[BirdsBeesTrees]

Do you have them on a non slip surface?
I'd start giving vitamins.