It’s when the poor ranchers can enjoy the full benefit of their permitted AUMs.
Consider this example from Appendix VII of the Final EA for wild horse management actions in the Caliente Complex:
To reestablish the health to the rangeland in the Areas we currently run Cattle the population of Wild Horses must be managed properly. Current numbers indicate a gross overpopulation of Wild Horses on our allotments as well as many others. We currently have an allotment that is supposed to allow us up to 327 Cattle (1312 AUMS) on our Sheep Flat permit. The damage because of overpopulation of Wild Horses has made it to where we can barely run 100 head on this Allotment and not for the full grazing season. We have to gather cattle and move them to rented pasture in Barclay to finish out the summer season.
Can you imagine that? Having to pay market rates to feed your cattle? You wouldn’t wish that on your worst enemy.
Western Horse Watchers Association 