A kitten born with two faces and a large, merged middle eye is thriving despite concerns its health would deteriorate after birth.

Bettie Bee was born in Eastern Cape, South Africa on December 12, along with two other cats, reports the ABC news.

The owner had difficulty nursing the kitten and became concerned the newborn would starve, according to Newsweek.

Instead they brought Bettie Bee to a cat rescuer, who now cares for the cat and posts updates and photos for thousands of people following its progress.

The rescuer said on Facebook the kitten was ‘doing well’ and ‘growing nicely’.

She is a diprospus or Janus cat. The name "Janus cat" was coined by British zoologist Dr Karl Shuker, based on the two-faced Roman god of transitions, gates and doorways.

Domestic cats with two faces are extremely rare and typically die young, but Bettie Bee is showing promising signs — eating and gaining weight at a healthy rate.

The kitten can be fed by either mouth as both lead to the stomach, the rescuer told Newsweek.