Look for the word "usually" in my first sentence.  Yeah we can graze our cattle on HMA as well, the horses and cows still try to stay separate.  It's usually ranchers that have land our blm land that borders a hma, most of these ranchers have land set aside for the horses.  We also provide water to these areas.  Hey, we're not all complete jerks. 

BLM says there are still too many, personally I don't have much issue with them, the ones with the most problems may have had a bad winter a hundred years ago when horse herds came from the hills, looking for food, and raided some ranchers hay stacks.   This doesn't mean that the land set aside for them can sustain the current population, let alone growth.