Which of the following is NOT a common predator of sheep?

Deer are not common predators of sheep. In fact, deer are herbivores, primarily feeding on grasses, shrubs, and other vegetation. They do not pose a threat to sheep in terms of predation. While coyotes, wolves, and mountain lions are all carnivorous animals known to actively hunt and prey on sheep, deer simply do not have the dietary needs or predation behaviors to classify them as a threat. Therefore, choosing deer as the answer indicates an understanding of the food chain and the specific behaviors of these animals in relation to sheep management.