Running Rabbit was born into a prominent family. His older brother Many Swans, who took their father's name, was chief of Biters band of Siksikas to which they belonged. As a teenager and young warrior, Running Rabbit had not performed any great deeds worthy of recognition until his brother lent him an amulet said to have spiritual powers made from a mirror decorated with eagle feathers, ermine skins, and magpie feathers. Running Rabbit was successful during his first ever raid as a warrior, gaining himself two enemy horses which he captured and gifted to Many Swans. Similar success during following expeditions resulted in Many Swans giving Running Rabbit the amulet as a gift. Word of Running Rabbit's success spread throughout the Biters band and many referred to him as the "young chief" before he earned or was appointed any leadership position in the band.