I call it "goat polo" because I can't remember its correct name. Boushikasi or something remotely like that. It is similar to polo but uses a goat that is grabbed away by the opposing team, and I have seen it in one movie, "The Horsemen" with Omar Sharif. My favorite rule is that if a player gets too close to crossing the goal line, his own team members will try to take the goat from him to prevent him from scoring! I believe it is mentioned in Caravans by James Michener.