
Thumbelina, the worlds smallest horse, weighs the same as a medium-sized dog.

Thumbelina's handler says the small horse seems unaware of her size and often takes charge around the farm.

In 2002 she made history with the Guinness World Records after measuring 44.5cms (17.5 in) tall. She was born with dwarfism at Goose Creek Farm in St Louis, Missouri.

"She stands her ground and she doesn't take anything from other horses but at the same time she's always been so sweet and calm and tender with kids," says Thumbelina's handler, Michael Goessling.

Now 17, Thumbelina lives a quiet life on the farm, sleeping in the dog house -- using a set of doggy doors to get in an out of the barn.

Early on, Thumbelina's owners decided to turn her into a therapy animal. "She visited cancer patients, burn patients, they were kids that were really struggling -- sometimes emotionally -- and they'd have that moment with Thumbelina. I had more parents come up to me with tears in their eyes saying it was literally the happiest moment of their child's life.

Big Jake became famous worldwide in 2010 after he was crowned the tallest in the world by the Guinness World Records at an extraordinary 20 hands, 2.75 inches (210.2 centimeters or 82.75 inches.)

The average height of a Belgian horse is usually between 16 and 17 hands.