"According to the Forest Service, the feral cattle problem dates back a half-century, when a cattle operation went out of business and subsequent grazing permits were suspended. Hundreds of unauthorized cattle have been removed over the years."
https://news.yahoo.com/us-forest-issues-kill-order-010809728.html#:~:text=According%20to%20the%20Forest%20Service%2C%20the%20feral%20cattle%20problem%20dates%20back%20a%20half%2Dcentury%2C%20when%20a%20cattle%20operation%20went%20out%20of%20business%20and%20subsequent%20grazing%20permits%20were%20suspended.%20Hundreds%20of%20unauthorized%20cattle%20have%20been%20removed%20over%20the%20years.