Rogues of the Borderlands
The old Eriadoran saying says: “Worry about the wolf that you don’t see.” This adage no doubt refers to the red wolf, the chief predator in settled reaches between the Misty Mountains and the Blue Mountains. These beautiful wolves are particularly common in southern Eriador, from Cardolan south to the Belegaer.
Unlike the common grey wolf, the red wolf is a vicious hunter, tireless in the chase, and prone to kill simply for sport. Their primary prey is sheep, but red wolves are not afraid of Men and they will readily attack lone individuals or small groups. Sheep hounds, however, have proved to be an effective counter to these intelligent and ruthless canines.
Source: Middle-Earth Roleplaying Wiki