Usually they prey only upon calves and sickly animals; but in midwinter I have known one single-handed to attack and kill a well-grown steer or cow disabling its quarry by rapid snaps at the hams or flanks.

Only rarely have I known it to seize by the throat.

Colts are likewise a favorite prey, but with us wolves rarely attack full-grown horses.

They are sometimes very bold in their assaults, falling on the stock while immediately around the ranch houses.

They even venture into the hamlet of Medora itself at night--as the coyotes sometimes do by day.