According to numerous stories, a horse is the suspected in the slashing and bloodletting of at least 20 other horses. The events happened between July and September of last year at Tucson's Tanque Verde Guest Ranch. The rash of attacks was stopped when an employee at the ranch witnessed the vampiric horse biting another horse in the neck near the jugular vein. The perp horse was isolated, and there has been no more reported incidents.
You can read other stories about it here:
http://www.dailystar.com/dailystar/dailystar/26433.php
http://www.cnn.com/2004/US/Southwest/06/17/horseslashings.ap/index.html
You can read other stories about it here:
http://www.dailystar.com/dailystar/dailystar/26433.php
http://www.cnn.com/2004/US/Southwest/06/17/horseslashings.ap/index.html