Molossers are used for a variety of jobs that require strength and size. Some molosser types are used for search and rescue dogs, such as the Newfoundland and the Saint Bernard. Some are used as guard dogs to protect property from intruders. Livestock guardian dogs live alongside livestock and offer protection against large predators and poachers. The Greater Swiss Mountain Dog and the Newfoundland have been used as cart dogs. Source: https://en.wikipedia.org/