These figures show you why: Eighty five percent of the forage on 17 areas (representing about two dozen HMAs) goes to privately owned livestock. Not only do they want the pattern to continue, they want to tip the scales further in the direction of the ranchers, by reversing the growth rate of the horses.
Refer to the signatories of this unified statement from 2018.
Contraceptives are not the answer. The problem is public-lands ranching.
RELATED: Hypothesis Revisited.