Take one look at a Black Mouth Cur dog and you will know that this is not an indoor animal. This breed is strong and designed to manage rugged terrain with zeal. They have sturdy legs and cam have one of two types of coats. One litter can produce both coat types. The most distinctive characteristic of Black Mouth Cur dogs is the dark muzzle. This is a requirement for authentic examples of the breed. Medium size ears that hang and a deep chest are also trademarks of this type of canine. Tail length will vary from very long to short at birth. Some owners have their pet’s tail docked.