Is Your Dog Really a Dog?

Howled, a three-year-old ruby red pooch, was found dead in the woods. The dog's paw prints were matched with evidence taken from the scene of her death. Eureka is on CNN at 8 p.m. ET/PT Thursday and 10 p.m.-11 p.M. ET Friday. For more information or to order your copy of eureka, visit www.cnn.com/eureka.