They are probably the best pack animal in the game, for its size and carry weight it moves super fast allowing it to quickly transport huge quantities of supplies over long distances. It's recommended to pair it up with some other animals as guards as it can't do much in a fight and even though it has a massive health pool it regens health pretty slowly.
Good tanks for raids! Use as a frontline attack in front of Brontos or Gigas etc, can push tames back when attacking so you can use this for defence too. Their high speed allows you to run from turrets when on low health. Worth it when passive tamed as the low kib needed means you can tame more.