9 week old chicken is walking like a duck, help please

[christianfarms]

We have a nine week old speckled Sussex chicken (hen) that is squatting down and walking like a duck. Her feet do not appear injured. She is just squatting down and walking like that. Checked her booty, and it also appears normal, no poo clumps stuck.
She’s with 3 other sisters and they are all okay.
What could we do?

 

[Eggcessive]

Is she walking or sitting on her hocks? Can you start some super B complex vitamins to treat her for a riboflavin deficiency? Give her 1/4 tablet daily crushed into some food or a spoonful of water and give it to her. Post any pictures or upload a short video to YouTube if possible. This is a good buy:
https://www.walmart.com/ip/Spring-V...MI9rrzsIGGjQMV-0pHAR2qSiPaEAQYAiABEgImGvD_BwE