14. Bull Mastiff

The Bull Mastiff is the perfect poster child for the term “gentle giant.” They are absolutely massive dogs, but also very gentle and loving. They can be very protective of those they love, making them great guard dogs, but are never aggressive toward their families.

They love pets and cuddles and have a belief that they are much smaller and therefore much more manageable than they are!

15. Chesapeake Bay Retriever

This quintessential American breed of dog is known for its clever, curious nature. They will get into absolutely anything if left to their own devices, meaning distractions and toys are a must for the Chesapeake Bay Retriever!

Originally bred to hunt waterfowl, this breed is fantastic for families and makes a great companion for hikes and runs.

16. Doberman Pinscher

Known for their athletic prowess and aggressive nature toward strangers, the Doberman Pinscher makes an excellent guard dog. However, the same loyalty that makes them defend their master also makes them amazing family dogs, provided they are trained and socialized early. They are very clever, so while training is essential, they pick up on cues and commands very easily.

17. Dogue De Bordeaux

Their squat bodies and square heads make this breed look a bit silly, but they are anything but. Much like the Bulldog, this French breed is very active and requires a lot of socialization. They become despondent when on their own, so be sure to have a lot of free time play, run and introduce this breed to others. They are intensely loyal and form bonds easily, so you’ll always have a true companion.

18. German Shepherd

Meet the German Shepherd, the granddaddy of them all when it comes to guard dog breeds for men. When it comes to working dogs, few can match the intelligence, and hardworking nature German Shepherds bring to the table.