Cattle and sheep are not, and never were part of the North American ecosystem.
The thriving ecological balance of the original statute referred to the relationship between wild horses and wildlife, not privately owned livestock.

Western Horse Watchers Association
Exposing the Hypocrisy, Lies and Incompetence of the Wild Horse Advocates
Cattle and sheep are not, and never were part of the North American ecosystem.
The thriving ecological balance of the original statute referred to the relationship between wild horses and wildlife, not privately owned livestock.
