Goat

Goats are a species of animal found in Red Dead Redemption and can be hunted to obtain their skin and meat.

Goats are one of the oldest domesticated species. Goats are used for their milk, meat, hair, and skins over much of the world. In the twentieth century they also gained in popularity as pets. Farmers keep them for easy access to milk and meat, primarily, also for their dung, which was used as fuel and their bones, hair, and sinew for clothing, building, and tools.

Domestic goats were generally kept in herds that wandered on hills or other grazing areas, often tended by goatherds who were frequently children or adolescents, similar to the more widely known shepherd. Goats come in 3 different colors, White, Black and brown.

Locations
There are many Goats in Mexico, Critchley's Ranch in New Austin and just north of Ojo Del Diablo.

Trivia

 * None of the official trailers release to this date feature goats. However, goats were shown in the Weazel News trailer for Ballad of Gay Tony as part of "archive footage". Rockstar Games later confirmed the goats were from Red Dead Redemption.
 * Killing a goat is not required for the Unnatural Selection trophy/achievement.
 * Goats are the only mamals that do not have an undead form in the "Undead Nightmare" pack. This may be as Goats are often associated with Satanic Ritual, and as such are unaffected by the plague. This as well as nearly being unkillable.
 * In free roam, some players will start games of "goat football" (soccer), using a goat as the ball and the arched entrances of Chuparosa as goals.