My rooster is very wobbley and unsteady, he has had two previous injuries from landing on his leg wrong when he tries to spur something. Never broken any legs. But I could of sworn I read b vitamins help with leg issues?
Vitamin B helps with energy. In cases with chickens it helps when they are stressed or sick by giving them the extra energy. Kind of the same way you and I do when we grab a cup of coffee and chill. Afterwards you feel a little better.
In basics, B helps to metabolize fats and carbs. It promotes red blood cell synthesis and it helps maintain nervous system integrity.
On a side note, I read a 12 week study that said as vitamin b increased, egg shell thickness decreased and egg weight, hen weight, and hatchability increased.
For what it’s worth, B will give him energy to help heal.