Yoda the cat with four ears.

The household pet, named Yoda, was born with an extra set of ears.

Valerie and Ted Rock took him in two years ago after visiting a bar near their home in Chicago, where he was being passed round by curious drinkers.

He was one of a large litter and the owners were looking for a home for him.

After adopting the eight-week-old kitten into their Illinois home, Valerie decided to have Yoda checked out with the local vet.

But the vet was mystified by his unique appearance.

'The vet had never seen anything like it before,' explains Valerie. 'He immediately went to the internet and found the four-eared cat in Germany.

'We have spoken with other vets in our acquaintance, and they likewise had never encountered anything like this.

'We began to realise that we had something very special.

'As a result, he has been an indoor cat and has a chip installed in case he gets lost. Yoda is so different that we were concerned that he might be catnapped.'

Yoda's extra 'flaps' are separate to the base of his skull, with one placed slightly behind the other.