Grumpy Cat's new rival Sauerkraut is taking over the internet

Looks like there's a new sourpuss in town.

Meet Sauerkraut. The 2-year-old kitty with the permanent look of disdain lives in Oklahoma after being adopted from an animal shelter by Amy and Patrick Bender. Her disapproving look is caused by a neurological disorder called Feline Hyperesthesia Syndrome and has to wear clothes to stop her from injuring herself. But don't mistake her look for her personality: Sauerkraut's owner's say she's one happy cat.

 "When Sauerkraut came to us as a foster, it was clear early on that she had some neurological problems," Amy Beder told ABC News. "But now she weighs about 5.5 pounds and is fully grown. Many people are surprised at her tiny size. She is full grown and has enough attitude for three normal sized cats."

Since taking the internet by storm, Sauerkraut's Instagram page has grown with over 30-thousand followers. 

Tardar Sauce, or as the internet knows her as Grumpy Cat, became an internet sensation in 2012 and now endorses Friskies and is the subject of many hilarious memes online.