Nearly a decade after the first wolf pack was confirmed in California, ranchers in Sierra Valley have faced increasing challenges from wolf attacks on livestock. The Beyem Seyo wolf pack began preying on cattle in March 2025, leading to significant economic losses for local ranchers.
Despite efforts by the California Department of Fish and Wildlife (CDFW) to deter the wolves using non-lethal methods, including deploying a Summer Strike Team of biologists and wardens, attacks continued to rise. Over 114 days, staff spent 18,000 hours attempting to prevent further losses. By October 2025, 92 cows and calves had been injured or killed by the pack. As a result, four members of the Beyem Seyo pack were euthanized.
A study conducted by UC Cooperative Extension analyzed both direct and indirect costs associated with these events. Tina Saitone, professor of Cooperative Extension at UC Davis, and Tracy Schohr, livestock and natural resources advisor at UC Cooperative Extension, estimated that verified cattle losses between March and October 2025 totaled $234,735 based on fair market value. These verified kills were eligible for compensation under California’s Wolf Compensation Program.
Saitone stated: “Beyond direct predation, wolves impose additional costs. Cattle exposed to wolves show increased vigilance and avoidance behaviors that reduce weight gain and conception rates while increasing disease vulnerability. Producers face higher expenses from intensified monitoring, fence repairs, non-lethal deterrents, and depredation investigations.”
When unconfirmed or missing cattle were included in their analysis, total wolf-related losses ranged from $533,688 to $1.7 million depending on methodology used. Adding agency intervention costs—over $2 million—the total damages attributed to this single wolf pack reached at least $2.6 million in 2025.
The research highlights the importance of wildlife agency resources and funding for comprehensive compensation programs for livestock loss.
For more details about the economic impacts of the Beyem Seyo wolf pack on California ranchers and agencies involved in managing these conflicts, readers can access the full article by Tina L. Saitone and Tracy K. Schohr titled “The Beyem Seyo Wolf Pack: Economic Toll of Unprecedented Livestock Conflict in California” published by ARE Update through the Giannini Foundation of Agricultural Economics at https://giannini.ucop.edu/filer/file/1767890615/21559/.
ARE Update is a bimonthly publication produced by members of the Giannini Foundation—including University of California faculty and Cooperative Extension specialists—to inform policymakers and agribusiness professionals about new research related to agricultural economics. More information about the foundation’s work can be found at https://giannini.ucop.edu/.
