Chick kicking backwards when walking

[Slothinc]

I have a few day old chick who has been walking fine but has started kicking backwards when walking which usually results in it tripping. It still zooms around but is slightly slowed down by the kicking. I found this video (below) on another thread and the movement is similar. I think I have seen it kick with both legs (not at the same time). Any ideas? Neurological? I’m putting electrolytes and vitamins back in their water (had it for the first couple of days, but stopped because they seemed fine.)

Video of similar kicking:

 

[Luckyhen006]

Hmmm... Do you have a picture of your chick??