Five of the strongest dog breeds in the world

Weighing as much as 250 pounds (113 kg) in males, and 120-180 pounds (54-82 kg) in females, the English Mastiff is undoubtedly giant, but that doesn't stop it from being one of the most loyal and gentle breed out there.

They are intelligent and calm (yes). But don't worry - they'll come to your rescue whenever needed.

Their average life expectancy is 11 years.

With weight varying from 50 to 60 kg in males, and 35-48 kg in females, Rottweilers are medium-sized domestic breed dogs.

The height could be anywhere between 24-27 inch (61-69 cm) in males and 22-25 inch (56-63 cm) in their female counterparts.

Given their intelligence and skills, they are often used as guard/police dogs.

Rottweilers live for an average of 10 years.

St. Bernards are giant dogs, usually weighing between 65-120 kg, but they can reach as much as 140 kg.

They can be as high as 28-35 inch (70-90 cm), which is huge by all dog breed standards.

Originally from Northern Italy and the Swiss Alps, St. Bernards are often used for rescue missions.

Of course, they are powerful, but also equally playful and patient.

While a full-grown male bull dog could weigh somewhere 23-25 kg, its female counterparts weigh usually 18-23 kg.

Their height could reach up to 15 inches (38 cm).

This medium-sized dog breed is quite popular among the English.

Don't get duped by the size, bull dogs are extremely strong and muscular.

The average life expectancy of bull dogs is 9 years.

With a weight of 20-27 kg in males, and 16-23 kg in females, Siberian Husky is a medium-sized dog breed, having a muscular built and double coat of hairs.

Intelligent and gentle by nature, Siberian huskies, if trained well, can be great family dogs.

In fact, your kids will love it, if you bring one.

Siberian Huskies live for an average of 12 years.