The movie is black and white. It was about a little girl that befriended a white stallion. There were men wanting to kill the stallion, the little girl would raise a white flag on a pole and the horse would come she got sick and yad yad yad... in the end after the flag had been up a while the girl thought snowfire was died but he came running down the mountain

Surely, someone out there remembers the old black and white movie" Snowfire" I would love to buy it.