The large, aggressive, domestic canids will actually chase down coyotes and kill them. Still, Thompson says if environmentalists are successful in dismantling ADC a backlash will be felt across the West. Vigilante ranchers will take matters into their own hands and start putting poison out again, even though it is illegal. The same thing will happen again if you do away with the ADC and it won't be pleasant on the animal kingdom. ADC is needed because we can't change the coyote and turn it into a vegetable lover.
Coyotes are a predator.
Meat-eating animals prey on things that are easy to catch. The story is that they always kill the weak and the sick but that's a fallacy. They'll kill your best lambs. Guard dogs, guard llamas. Crabtree says that livestock grazing, when combined with campaigns to control coyotes numbers, may actually spur more killing of sheep.