Scrapie.

Scrapie (pronounced SKRAY-pee) is a fatal disease that causes the degeneration of the central nervous system in sheep and goats. Although it is transmissible among different animals of the same species, no evidence exists to suggest that it can be passed to humans. As animals remain symptom-free for several years, it can be very difficult to diagnose. The only known method of controlling transmission is to quarantine and destroy all infected animals. It is far more common among sheep than goats.