They’re using PZP to reduce wild horse populations, with the inevitable result of mass sterilization.
The technique was pioneered at Assateague Island, where, as of last year, the herd was still shrinking eight years after the darting program was shut off.
The advocates sell it as a humane alternative to motorized removal, claiming the pesticide is safe and reversible.
The Public Lands Council represents cattle and sheep producers who hold grazing permits on public lands across the western U.S.
Western Horse Watchers Association 