Pekin drake having issues with his left leg

[Memi1013]

Hello! I'm currently having an issue with my Pekin drake. Seems like he doesn't want to lift his left leg to take a step. When he stand he always has his wings out for balance I am assuming. Then when he does take a step he either trips himself, his toes and foot curl under(like he isn't lifting his leg high enough) or he falls over catching himself with his wings.

 

[Wyorp Rock]

Is he getting enough Niacin?

https://www.backyardchickens.com/articles/niacin-deficiency-in-waterfowl.75862/