Mans best friend is many times our last line of defense. But something strange is killing Fido. In 2006, a rash of pets were killed in Maine and Minnesota by a beast locals describe as a mutant. But there are more than just stories, a creature was hit by a car and the body was found. This strange looking creature will be DNA tested to see what it really is. And two MonsterQuest winter expeditions will be launched to trap other dog killers still at large.