I've been wondering about this for a while. One of my very experienced horse friends runs a boarding facility. She says she does not allow horses with shoes on their hind legs to be pasture boarded. The reason? She once had a shod horse kick another horse in the head and it died instantly.
Is this a common stipulation among boarding facilities? If a horse kicks another horse in the head with or without shoes, what's the likelihood that the horse will die from such an injury? Did the shoes really make the difference between life and death?