Grissom is a 4-year-old German shepherd/mastiff mix. He is exceptionally loyal to his people and likes smaller dogs, cats and female larger dogs. He can be slow to warm up to large male dogs. Grissom ...

Discover the 10 strongest dog breeds in the world, from the loyal German Shepherd to the massive Tibetan Mastiff. These powerful pups are known for their strength, endurance, and courage.