For the past three years, a mysterious micro-organism has been infecting the famous wild ponies of Chincoteague National Wildlife Refuge.
The infection is known as swamp cancer and it has killed eight female ponies so far.
The volunteer fire department that owns the herd and the U.S. Fish and Wildlife Service, which oversees the refuge, have brought in scientists and veterinarians to try to eliminate the culprit and cure the disease.
Pamela D’Angelo reports.