More animal rights ignorance

The Interior Department is asking a federal judge in Montana not to intervene in the impending slaughter of potentially hundreds of wild bison that were captured after migrating out of Yellowstone National Park.

http://distanthorizons-usa.com/2011/02/07/interior-asks-mont-judge-to-allow-bison-slaughter-ap/

When will animal rights groups learn that unless you cull over populated herds, the excess population will die of disease, hunger or predation, thereby weakening and threatening the viability of the survivors? There's nothing cruel about rational animal management.