Also known as Buffalo, invented in 1975 by Alex Randolph.
Still commercialized in Germany (named Buffalo) and in France (through L'Eveil des Jeux).
Described in France in Science & Vie, no.124 in September 1978.
Also in the 'Guide des Echecs Exotiques et Insolites', Jean-Louis CAZAUX, Chiron, Paris, 2000
 
Object: For the Hunter, take or immobilize all Bulls. For the Bulls, get a Bull down on the first raw.

• A Bull moves 1 case straight forward.
  It can not eat Dogs or Redskin, of course.
• A Dog moves any number of cases vertically, horizontally or diagonally (like a Queen in Chess).
  It can only immobilize a Bull by stopping it. It can not take. It may not cross a river.
• A Redskin can move to any adjacent square (like a King in Chess), but never cross a river.
  He takes a Bull by coming on its case (as a take in Chess).