Water brahmin

 is living in the Mojave Wasteland in 2281.

Background
It is 'pushable'. Sneak, holster your weapon, and press the 'activate' ('E' on the PC) key/button on it to do a special shove move.Water brahmin server a similar purpose to caravans in Fallout 3 although the only goods they carry are sacks of water.

Appearances
appears in Fallout: New Vegas.