The Committee on Appropriations designated the amount in the FY 2023 spending bill for Interior, Environment and Related Agencies, according to a report posted this morning by the Wyoming Tribune Eagle.
The move was applauded by the Campaign Against America’s Wild Horses, a ranching advocacy group and leader in the wild horse removal industry.
A compilation of the effects of PZP on wild horses, assembled in 2015, appears in a report prepared by ISPMB, beginning on page 30.
The principle of operation touted by the advocates is not correct. The pesticide tells the immune system to attack the ovaries.
This explains why mares become sterile after five years of treatment: Their ovaries have been destroyed, or nearly so. The advocates refer to these animals as “self boosting.”