The Whittaker family have a complicated history of inbreeding - and it's left them with heartbreaking genetic defects.
Some members of the West Virginian clan can only communicate through grunts and barks instead of talking and even run away when people try to speak to them.
Living in the village of Odd, which is 75 miles from Charleston, the Whittakers can't remember much about their parents or other family members and didn't know their genetics issues were due to inbreeding.
