Mad Sheep: The True Story Behind the USDA's War on a Family Farm by Linda Faillace
The USDA is charged with both regulating and promoting US agriculture. Obviously, these goals conflict and the end result is that the USDA often functions as a powerful guardian of industrial agricultural interests.
If they made an X-files about agriculture, it would resemble Mad Sheep. Scary government agents in sunglasses torment this family and seize their sheep without giving them much chance to defend themselves. It seems that this action was less about a disease than about protecting the interests of the cattle industry. Even if these sheep did harbor a disease, the USDA's actions are like shooting a mouse with a machine gun.