The BLM has not yet identified an immunocontraceptive method that has been proven to reliably and humanely sterilize wild mares according to the Silver King EA, published earlier this week (page 136 in the pdf).

An oocyte growth factor vaccine is currently under testing for its ability to cause long-term infertility or, potentially, sterility.

As for the approved methods, “Mares that received 5 or more doses of ZonaStat-H vaccine have been shown to have reduced ovarian function, and to be effectively infertile for life (Nuñez et al. 2017), and it is conceivable that the contraceptive effects of repeated treatment with GonaCon-Equine may last longer than a mare’s lifespan, depending on the mare’s age at treatment and the number of doses received (Baker et al. 2018, 2023).”

Researchers at Purdue are working on a formulation that does the job with one shot.

The advocates, evil beyond imagination, are not waiting for scientific breakthroughs.

They’re demonstrating the feasibility of mass sterilization at the Salt River, Virginia Range and elsewhere.

The pesticides do not kill horses, as stated on page 15 of the EA, they kill herds, much to the delight of the ranchers and their political allies.

PREVIOUS: Foal-Free Friday, Driving the Advocates Nuts Edition.

► Get the truth about wild horses and the wild horse advocates at westernhorsewatchers.com.