I heard on the Mark Levin show a night or two ago that the tortoises they are so concerned about are actually thriving - so much so that they are euthanizing them in the protected areas that have been set aside for them. Also, he said they have existed with the cattle for many years with no ill effect. I have not heard that reported anywhere else. The real story, of course, is Harry Reid, his son and the solar farms the Chinese want to build on that land - the new head of the BLM Nevada - a Reid donor. Additionally, as someone here posted a few days ago, why does the Fed. Government own sooooo much of the territory of the western U.S.? It looks like a third of the entire U.S. if not more!
Cows improve the habitat for the tortoise by breaking crusted soils and fertilizing them. That promotes the growth of grasses and forbs that he tortoise needs for food.
The biggest problem for the tortoise is that ravens and crows eat their young, about which the BLM does very little.