2. Rottweiler

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The Rottweiler is a stalwart, powerful and protective breed that also ranks high on smarts. This breed can be trained for obedience and protection, and ranked number 12 out of 197 on The Intelligence of Dogs list. A hard worker and loving family dog, these pups are great for active people who want a guard dog, but don’t want to sacrifice some personal cuddle time as well. They weigh about 90 pounds (41 kg) and stand 25 inches (64 cm) tall at their shoulders. It’s not unusual for them to live as long as 10 years, so plan accordingly if you own one!