[3] Horse "describes himself as half-Indian and part Zuni, Mescalero, Yaqui and Hispanic with a touch of Swedish….

"[4] In 2017, American art writer Daniel Grant wrote, "Horse has refused to apply to any one tribe for enrollment.

In 1999, Horse guest starred on Walker, Texas Ranger in the episode "Team Cherokee" as John Red Cloud, the owner of a Native American NASCAR racing team and a friend of the titular character, Texas Ranger Cordell Walker (Chuck Norris).

Horse portrayed American Indian Movement (AIM) activist Dennis Banks in the 1994 film Lakota Woman: Siege at Wounded Knee.

In 2017, Horse reprised his role as Deputy Hawk in the third season of TV series Twin Peaks.