By John Balson @JJBalson

THE world’s biggest pitbull has struck up a bizarre friendship with a tiny chihuahua more than thirty times smaller than him

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Videographer / director: Ruaridh Connellan
Producer: John Balson, Nick Johnson
Editor: Joshua Douglas

Tog dogs: Hulk and Mami are best friends at the Dark Dynasty K9s ranch in New Hampshire

World-famous Hulk, who shot to fame last year in a viral video, weighs in at 181lb while tiny Mami weighs just five pounds.

Pitfalls: The relationship doesn't suffer because of their massive size difference

But the difference in size and power hasn’t stopped them becoming firm friends who spend all day together.

Paws for thought: Hulk and Mami take a rest on their favourite rock

Owners Marlon and Lisa Grennan of Dark Dynasty K9s bought Mami to see if they could train her as a protection dog.

Heat of the moment: Hulk only has to be kept away from Mami when she is in heat

They started by introducing Mami to their world-renowned pack of protection pitbulls when she was just a few weeks old and she has been part of the family ever since.

His and hers: Hulk gets much more food than Mami but still tries to eat hers from time to time

Lisa, 25, said: “Mami has a pitbull attitude. She thinks she’s a big dog, she’s tough and holds her own in the house.

I got your back: Mami has the personality of a pitbull, her owners say, and can hold her own in the house

“I don’t think she's really at danger playing with Hulk.

“He’s very aware of her size, he’s very gentle with her. They play really well together.”

Fang-tastic: Hulk gets his teeth cleaned regulalry to keep them in top condition

Hulk and Mami eat, sleep and play together almost everyday at the family’s facility in New Hampshire, USA.

Little and large: Hulk weighs a hefty 181lb while Mami weighs just 5lb

The only time they have to be separated is when Mami is in heat and Hulk’s instincts drive him to try and mate with her.

Creature comfort: Hulk and Mami have grown up with each other

Experienced dog trainer, Marlon said: “It could be unusual to some people to have a chihuahua in with all these pitbulls but it’s not unusual to me.

Headspace: Mami the chihuahua climbs up on gentle Hulk
Stronger together: Hulk and Mami eat, sleep and play together and are inseperable

“They are so comfortable because of the way they were raised, they have rules, boundaries, limits and balance. When you insert balance into a dogs life anything is possible. She’s part of the family."

Dark Dynasty K9s specialise in training elite protection dogs for the police, celebrities and billionaire clients around the world.