She has an extreme case of dwarfism which means she'll stay kitten-sized her whole life. Her owner calls her 'one of nature's happiest accidents'.
Lil Bub is a very unique kitten. With her bulging green eyes and tiny form she's quite striking. On first glance you'd probably think she was a kitten but she's actually seven years old now. Her extreme form of dwarfism means she'll never grow any bigger.
Lil Bub was found in 2011 when she was only a few weeks old - the runt of a litter of feral cats. It was clear that she would need special care so she was taken in by a rescue centre.
Lil Bub's special needs
As well as her dwarfism, Lil Bub's limbs are disproportionately small in relation to her body. Her lower jaw is also shorter than her upper jaw and her teeth never grew in so her tongue hangs out.
She's also a polydactyl cat - which means she has an extra toe on each paw - adding up to a total of 22 toes!
At one year old, Lil Bub was also the first cat ever to be diagnosed with osteopetrosis - an extremely rare bone condition which causes her bones to grow progressively denser, making it harder and harder for her to move around. By the time she was one-and-a-half, she was practically unable to move at all. The condition is very hard to treat but Lil Bub has benefitted from Pulsed Electromagnetic Field Therapy which has enabled her to run and jump again.
Lil Bub's personality
Lil Bub is an amazingly calm cat who loves to travel and explore the world around her. She is very well-behaved and will sit on her owner's lap in cars, planes and underground trains. She even loves to sit on her owner's shoulder when they go outside.
She also has a very healthy appetite and eats both wet and dry foods.
Lil Bub has become pretty well-known on the Internet and she's used her fame for good - advocating for homeless pets and pets with special needs worldwide. She's so far raised over 200,000 dollars for various animal charities through special meet-and-greets and selling merchandise such as cuddly toys, jewellery and even her very own book on her online store.