"This will help defuse the argument about brucellosis, that the animals are carrying brucellosis and will give it to cattle around them," wildlife pathologist Jack Rhyan of the health inspection service told AP. "I'll feel more positive after 1,000 animals have gone through. That's just caution because this disease sometimes crops up where you never think it can."
Already this winter, over 200 of the 4,600 bison in Yellowstone have been killed, and 600 to 800 are expected to be killed in total. If healthy bison can be removed from the herd and new disease-free herds can replace diseased ones, there would no longer be a need for the controversial yearly cull, which kill hundreds of animals each year, researchers say.