Right now, it's good to be a bison farmer. There's a growing demand for the meat, prices have doubled, and there's a lot more interest in the food community, something attributable to the changing American diet.
In exchange (ultimately for their lives), they received protection from predators, assistance in bearing young and even rudimentary health care. What would become of our domesticated animals if we were to stop eating them?
I am not accusing Taco Bell of selling contaminated meat but merely pointing out that "blandness" is almost the least of your problems if you rely on feedlot animals or culled dairy cows for your beef.