I kickstarted some with some kombucha yeast that I had left over from a batch. I think it got the starter going faster, and it's been making good bread. I'm 15-20 generations in now.
> Has anything tried kickstarting their starter using yogurt?
Why would you kickstart a yeast (fungus) culture by giving it competing organisms (bacterial cultures) from yogurt?
That is where the sourness in sourdough comes from. sourdough starter has a balance of yeast and bacteria.