Do zorses have enemies

In the wild, horses are naturally prey. Depending on where the wild horses live, they have many enemies. For example, in the western part of the US, cougars, mountain lions, wild dogs, etc. may attack and kill a wild horse. Zebras are eaten by lions, crocodiles (when they cross rivers), etc. It is hard to list all the enemies of the wild horses, unless you tell me the place the horses live.