Right. There are no cattle in the West Yellowstone area from November to June of each year. The winters are too harsh for cattle so they are relocated to a milder climate. So why does the Montana Department of Livestock slaughter buffalo when there are no cattle in the West Yellowstone area and no risk of brucellosis transmission? Good question, we urge you to ask the Montana Department of Livestock yourself by sending them an email. In general only 2000 cattle are grazed on the National Forest lands in the cattle-buffalo conflict zone around Yellowstone National Park. These National Forest lands were established expressly to protect winter range for buffalo and other park wildlife. The Forest Service could close grazing allotments or modify the stocking dates of such allotments to provide much needed winter range for buffalo and to ensure no buffalo/cattle overlap.

See Yellowstone Bison - Cattle Conflict Fact Sheet