Cheyenne

 is Sunny's dog in 2281.

Quests

 * Back in the Saddle: Cheyenne helps her owner and the Courier attack and kill a few geckos.
 * By A Campfire On The Trail: Cheyenne accompanies Sunny while she teaches the Courier how to create items using a campfire.
 * Ghost Town Gunfight: Cheyenne is part of the Goodspring settlers to help the fight the Powder Gangers. If the Courier chooses to destroy Goodsprings, Cheyenne will part of those killed when the Courier assaults the town with Joe Cobb.

Appearances
appears in Fallout: New Vegas.

Trivia

 * It is possible for Cheyenne to die while fighting the geckos, and if this happens, Sunny doesn't hold any resentment when this occurs and will continue to train the Courier.
 * Cheyenne is probably named after the Native American Cheyenne people.