These are not your average prey, in fact they are not prey at all. They are just buffaloes minding their own business. they pose no threat to the players cubs and are more or less harmless, unless the player gets too close , then an uneven match will begin. But of course everything in Untamed can be killed.
Killing a bison is a big achievement in Untamed: Life of a cougar and one worthy of recognition. A bison carcass can last for several days but they cannot be dragged by the player to a different place to feed on. This means that if the player takes down a bison the cub will have to be brought to the spot to feed on the carcass.