BLM said today that testing of a new fertility control vaccine began last week at the Northern Nevada Correctional Center in Carson City, NV. Researchers believe that a single dose may prevent pregnancy for three years or more.
The current wild horse and burro population in the western U.S. is thought to be around 95,000 according to the news release.
The number of privately owned cattle and sheep trying to graze the same land was not given in the announcement.
RELATED: Fertility Control Study Approved.