Cheyenne

Cheyenne is Sunny Smiles' dog in Fallout: New Vegas.

Background
Cheyenne is an attack dog and companion of Sunny Smiles. She's well trained and obeys Sunny's commands wells. The two share a very close bond, forged over the years of hunting together.

Quests

 * Back in the Saddle, By a Campfire on the Trail: Cheyenne accompanies Sunny and the Courier as the latter acclimatizes to living again. Notably, Cheyenne can die during the quest and Sunny will be distraught by her loss. This is amplified by the fact that Cheyenne will protect anyone who attacks the Courier while clearing out Geckos at the spring.
 * Ghost Town Gunfight: Cheyenne is part of the Goodspring militia and will fight the Powder Gangers.
 * Run Goodsprings Run: If the Courier chooses to attack Goodsprings, Cheyenne will be one of those killed when the Courier assaults the town with Joe Cobb.

Appearances
Cheyenne appears only in Fallout: New Vegas.