The rarely seen genetic mutation has been documented back to 1938 in Ashtabula, Ohio, with a four-eared cat named Toots. The mutation has been studied, and is argued to be a recessive gene mutation needed from both parents in order to produce four ears.
Batman, who is three years old, has been unavailable for adoption because he was being treated for an upper respiratory infection. The Humane Society said his sickness was not related to his extra set of ears and he is now feeling better.
Officials with the Humane Society said Batman is very friendly and would do well in a home with or without animals, as he came from a house with several animals.
"As an open door shelter, we take in and care for any animal brought to us. Just when you think you've seen it all, a four-eared cat comes in the door! We are excited Batman is feeling better and look forward to him finding his forever home," said Hala Nuemah, managing director of the Western PA Humane Society.
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