The Bouvier des Flandres has lots of energy, and they are also very loyal.  They are also large and powerful, and are used to guard herds and hunt.
assitant
There are lots of other breeds.  Which characteristics are most important to you?
assistant
what dogs make good guard dogs?
user
Dogs are intelligent, they are trainable, and they are also warm and friendly.  Can I recommend a breed for you?
assistant
Okay, sure.
user
The Dogue de Bordeaux is a breed of large, very friendly dog, and is sometimes called a “French Mastiff”.  They have a lot of energy and are very loyal.  Can I
assistant
Okay, any others?
user