13 Dog Breeds That Start Off Very Small And Grow Unbelievably Huge

All dog breeds start off very small. While some stay small or grow to normal size, others grow up to be very, very large indeed.

Here are 13 breeds of large dogs that you may have never seen before.

1. Scottish Deerhound

small to giant dog breeds

These dogs are known as the “Royal Dog of Scotland,” and can get up to be 95-110 pounds and average out around 30 inches tall.

2. Irish Wolfhound

small to giant dog breeds

The Irish Wolfhound is the tallest of all dogs? A full grown male can stand 32 to 34 inches at the shoulder and easily weigh 120 pounds.

3. Black Russian Terrier

small to giant dog breeds

This breed can grow up to 140 pounds!  According to the AKC, the Black Russian Terrier was created for the Red Star Kennels, an army-controlled Soviet kennel program dedicated to developing special-duty breeds.

4. Great Dane

small to giant dog breeds

At only 6 weeks old, Great Dane’s can weigh up to 20 pounds. That’s why Great Danes are limited to activities when young because of health complications such as skeletal abnormalities, hip dysplasia (arthritis of the hips) and osteochondrosis, a condition that affects the joints of young, rapidly growing dogs.

5. Mastiff

small to giant dog breeds

A Mastiff can weigh up to 220 pounds.

6. Neapolitan Mastiff

small to giant dog breeds

Despite all those wrinkles, underneath is a powerful guard dog that can weigh over 150 pounds and stand up to 31 inches at the shoulder.

7. Newfoundland

small to giant dog breeds

These big, strong and fluffy breeds are from Newfoundland, Canada! They were originally trained as a working dog intended to pull nets and haul lumber. These guys are known for their strength and burliness.

8. Cane Corso

small to giant dog breeds

Cane Corsos are built like Mastiffs and are known to hunt big game like wild boar. They aren’t as big as Mastiffs but they are muscular and can weigh up to 120 pounds.

9. Great Pyrenees

small to giant dog breeds

They look like giant cotton balls but they are known for protecting you, or livestock. These gentle giants can weigh up to 160 pounds.

10. Bernese Mountain Dog

small to giant dog breeds

These big, fluffy, dogs just want to cuddle. Bernese Mountain dogs were bred to protect livestock and pull carts on Swiss farms. He is a large and hefty breed the with a soft personality.

11. Saint Bernard

small to giant dog breeds

This breed is known for finding lost and injured people. He is a large, muscular dog who can grow up to 30 inches tall and 180 pounds!

12. Tibetan Mastiff

small to giant dog breeds

This beauty does not shed. They “blow their coat” once a year, according to American Kennel Club. But like their other Mastiff friends, they can weigh up to 160 pounds.

13. Leonberger

small to giant dog breeds

The Leonberger, named after Leonberger, Germany, also known as a Leo, is a very large dog. Heinrich Essig, the creator of this breed, was said to want a dog that resembled a lion on the town crest.

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