Chick walking upright

I have a somewhat Albino Rhode Island Red chick about 5 weeks old with 5 siblings and mother hen. Yesterday afternoon i noticed it walking slighly off and today it is more pronounced. It is also standing upright. It seems to drag its legs a little and waddle much like a duck. Quick research and inspecting the chick leads me to believe its possibly a Vitamin B deficiancy? Vent is clean and clear, droppings are a little firmer than usual but otherwise normal. No visible lice or growths on the legs. Its legs did feel weak when i held it though. I have a video clip of it standing and walking but not sure how to upload or share it.
Many thanks,
Ernie