Much of the push to slaughter horses is coming from ranchers that want to use public lands to overgraze their cattle on. This is the same reason the bison from Yellowstone are killed. There has been no documented case of brucellosis transmission between bison and cattle. For the most part it is not an inability of the land to support the horses or the bison. The land cannot support the destructive cattle industry and horses and bison. The slaughter of wild horses is not what I would consider humane. They can be shot in the wild, or, they can be rounded up from the wild and trucked in to slaughter houses. To manage an animal at a slaughterhouse that is not accustomed to humans will not be a humane death if you consider a reduction of stress one of the components of humane slaughter. This push to end horse slaughter didn't come about because people were upset that old horses were being sent to slaughter. This came about because of the Burns (R-MT) Amendment to the Wild and Free-roaming Horses and Burros Act. If it is thought that bleeding hearts have gone overboard, then The Man needs to stop doing $hit that people will react to. The argument of not being a hypocrite in killing some animals and loving others does not need to go the direction of Lets Kill All Animals For Food. It's like the Feminist objection to having a door held open for a woman. Instead of a world where everyone lets doors slam other people in the face to uphold Equality, how about a world in which everyone holds a door open for everyone else.