Meet the world's chunkiest animals from the 'Schwarzenegger of kangaroos' and the 'world's most handsome horse' to a snack-loving monkey called 'Mr Fatty'

From a snack-loving monkey nicknamed 'Mr Fatty' to a two-stone cat that is often mistaken for a dog, not all animals are as cute and fluffy as the ones we have come to know and love. 

Although obesity is not normally a problem faced by the animal kingdom, some creatures have become social media sensations purely through their indulgent eating habits.

Others have ballooned to their enormous size through muscle weight alone, hitting the international headlines by showing off their toned physiques. 

Here, MailOnline takes you 'inside the world's chunkiest animals' with a selection of creatures whose SIZE has found them in the spotlight in recent years - despite it often having devastating consequences for their health. 

Roger the Kangaroo  

Roger, who stood at 200 centimetres tall, became an internet sensation back in 2015 when pictures surfaced of his bulging biceps, popping veins and prominent chest.

The red kangaroo lived in a sanctuary in Alice Springs, Australia, where he crushed metal buckets with his paws for fun. 

However, despite his toned physique, Roger was not able to defeat the aging process and he suffered from arthritus towards the end of his life. 

The kangaroo died at the age of 12 in December 2018 with sanctuary boss, Chris 'Brolga' Barnes posting an emotional tribute to him on Facebook. 

Roger, who stood at 200 centimetres tall, became an internet sensation back in 2015 when pictures surfaced of his bulging biceps, popping veins and prominent chest

The red kangaroo lived in a sanctuary in Alice Springs, Australia, where he crushed metal buckets with his paws for fun

'It's a very sad day here today for we have lost our beautiful boy, Roger,' Mr Barnes said.

'Ten years ago, I built this sanctuary to house Roger and a couple of his wives, Ella (and) Abigail. We built it so they'd have a place to live.

'Roger was our alpha male for many years and he grew up to be a kangaroo that people from all over the world have grown to love as much as we love him too.'

Uncle Fatty and Godzilla 

Weighing in at more than 20kg, legendary chunky monkeys Uncle Fatty and Godzilla shot to fame due to their life of indulgence - despite it having devastating consequences for their health. 

Cruelly kept on a lead and raised on a diet of junk food, Godzilla's weight ballooned to more than 20kg, and he became a major tourist attraction at his owner's market stall in Bangkok, Thailand. 

He soon drew comparisons with Uncle Fatty, another popular overweight primate, who had tipped the scales at 27kg and was believed to be between 10 and 15 years old.

Uncle Fatty (pictured) tipped the scales at 27kg and was believed to have been between 10 and 15 years old

Godzilla was compared with the late Uncle Fatty (above), a long-tailed macaque who is believed to have eaten himself to death

The monkeys were then forced into 'fat camp' were they were able to shift some weight on strict diet regimes. 

But after returning to the wild, and having not been seen in years, Uncle Fatty is now widely believed to have eaten himself to death.

Uncle Fatty once lived near a tourist hotspot floating water market in Bangkok, where he enjoyed a lavish lifestyle. 

The elderly monkey was popular with locals and tourists alike, gobbling any food that he good get his paws on.

But the abundance of food offered to him by visitors, which included sugary melons and sweetcorn as well as extremely unhealthy human food like milkshakes and noodles, meant he piled on the pounds.

With macaques normally weigh between eight and 10kg, the 27kg beast was the same weight as three of his kind.

Uncle Fatty was considerably larger than average-sized macaques, two of which are pictured with the obese monkey above

 Frederik The Great 

Frederik The Great, a Friesian stallion from the United States, may just be the world's real life black beauty. 

He shares his name with the ruler of Prussia from 1740-1786 and has a muscular build, striking black features and a flowing mane.

Frederik lives on Pinnacle Friesians, a farm in Arkansas's Ozark Mountains, US, and was imported there from the Netherlands when he was six years old. 

The stunning stallion amassed a hefty fan following on Facebook and an online gallery featuring artwork of him was even created. 

Fans of Frederik The Great have expressed their love for the handsome horse online over the years.

'Frederik, you are the most beautiful horse that I have ever seen. Only God could of created such artistry. Breath taking and magnificent,' one person wrote.

'There will NEVER be a more majestic, handsome, sexy horse on the face of the earth. Never, ever. I wish I could just touch and 'smell' him just once,' wrote another.

Frederik The Great, a Friesian stallion from the United States, may just be the world's real life black beauty

Abu the 18 stone dog 

Abu, a Turkish Malakli, weighs 18 stone - around the same as a baby elephant - and has previously been described as the UK's biggest dog.

When he was two years old, he ate 3kg of meat a day, including one whole chicken, three whole mackerel, two eggs, and raw meat dog food.

His monster diet was costing his owner, Dylan Shaw, from Redcar, Yorkshire, more than £4,000 a year. 

Speaking about his diet, Dylan said: 'He has raw meat, raw dog food, and whole chickens as well – he gets one chicken per day.

'He's very energetic when he's out but in the house you don't know he's there until you trip over him.

Dog trainer Dylan says Abu's diet costs him £11 a day which is a little over £4,000 a year

Abu, a Turkish Malakli, stands at 7ft 2in when on his hind legs and weighs the same as a baby elephant

'When he's stood on all fours his shoulders come above my hips – I'm five foot 11, and he makes me look like a child stood next to him.

'He thinks he's a lot smaller than he is, he tries to sit on your lap and crushes you but he's a big softy really, he cries when he gets told off.

'They don't fully mature until three so he's still got a year of growing to do - it's ridiculous, I don't know what I'm going to end up with - he's already outgrown my expectations.'

But despite his big size, Dylan insisted that Abu was a gentle giant and loves nothing more than snuggling on the sofa.  

A Turkish Malakli (pictured with his owner)  has been described as the UK's biggest dog 

The huge hound wolfs down 3kg of meat a day, including one whole chicken, three whole mackerel, two eggs, and raw meat dog food every day

Kefir the two-stone cat 

Kefir, a two-stone cat from Russia, is so big that people often mistake him for a dog. 

Named after the fermented milk drink, Kefir is an oversized Maine Coon belonging to Yulia Minina in Stary Oskol.

Yulia said: 'I could not even think that an ordinary baby can become so big.

'He not only grew up big in appearance, he is also very smart and always behaves calmly. 

'The look is generally like that of a person, and Kefir has a formidable appearance, but he is a very affectionate and modest child.

'When friends and acquaintances come to the house - all the attention is on him and he willingly allows himself to be stroked.'

A huge two-stone cat from Russia that is thought to be the world's largest is so big it is often confused for a dog

Kefir, named after the fermented milk drink, is an oversized Maine Coon belonging to Yulia Minina in Stary Oskol

Maine Coons also hold the record for the world's longest cat, with Stewie from Nevada measuring 48.5 inches from his nose to his tail before his death in 2010

The breed hails from the state of Maine in the US and is considered one of the oldest homegrown breeds in the country.

It was considered the largest breed of domesticated cat until the Savannah cat in the 1980s.

On average, males weigh up to 18lbs while females weigh up to 12lbs.

Maine Coons also hold the record for the world's longest cat, with Stewie from Nevada measuring 48.5 inches from his nose to his tail before his death in 2010.