New Grumpy Cat? Meet Sauerkraut, the new king sourpuss of the internet

Sauerkraut, the new challenger to the grumpy cat thrown, is taking the internet by storm. (ABC News / Amy Bender / Rex Features)

Sauerkraut, the new challenger to the grumpy cat thrown, is taking the internet by storm. ( Amy Bender / Rex Features)

Sauerkraut, the new challenger to the grumpy cat thrown, is taking the internet by storm. ( Amy Bender / Rex Features)