Perro

 is a minor character featured in Red Dead Redemption.

Perro is the otherwise unnamed dog that accompanies Marston on Nightwatch missions in Chuparosa. It is unlikely that Perro is the dog's real name, as perro is the Spanish word for dog. While Lobo the Wolf (with Lobo being the Spanish for wolf) does exist, the dog in Chuparosa is referred to as "the perro", not Perro. It is also unlikely that Perro is any kind of pure breed dog, sharing traits of a Border Collie and a Labrador.

During the Nightwatch activity, Perro will also attack the perpetrator, however most of the time he will rely on the player to injure the perpetrator to the point where he cannot stand. Though this may seem helpful, it can make it difficult to subdue and hogtie the perpetrator, seeing as most of the time he will be mauled by Perro while on the ground.