Can this Chick with curled toes improve?

[Nksg75]

hi,
I have a chick about 7 weeks old that recently(within the past week) has developed this curling of its toes.
It had gotten so bad prior to this video that she or he was walking around on its haunches. It has improved since only 1 foot is curled. About 4 days ago both feet were severely curled, and it was having a heck of a time getting around.
I figured it was a vitamin B deficiency, so I gave poultry nuetro drench. Later I looked at the ingredients and I dont see that it has any vitamin B.
I went out to the store and grabbed some poly vi sol, and straight vitamin B complex.
My question is if she/he has improved already with the wrong vitamins, will she heal any faster with the correct ones?
Tell me what you think.
Does it look like a vitamin B Issue?
Here is a video of her/he:

 

[Mraya]

If she is showing an improvement with no vitamin B just using the nuetro drench I would give her/him both and also check the ingredients in your feed.

 

[Nksg75]

Thanks,
Yes I am still a little unsure why it was just this chick. They were on chick crumbles from TSC.
I was using Dumor, however after this chick had the deficienciy I decided to switch them all to purine layena medicated chick crumbles.

 

[Nksg75]

Just curious of when you can tell if the paralysis is permanent?