Calico Dog May Be a Chimera

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A photograph of a dog at a veterinary hospital has gone viral this week because of the animal's unusual but beautiful markings. The Labrador Retriever, Bull, has a coat colored like that of a calico cat. He is a patient at Texas A&M Veterinary Medical Teaching Hospital, according to MSN Now.

Because of Bull's unique coat, he is suspected of being a chimera, a single animal that genetically is two animals, i.e., an individual that is its own twin. Bull, then, appears to be a chimera that is both black Lab and yellow Lab.

We saw this phenomenon last summer when a "two-faced" calico chimera cat named Venus caught the Internet's attention. Bull has emerged as Venus' canine counterpart, albeit without the same dead-even color split down the middle of his face.

Whether Bull is a chimera hasn't been confirmed medically yet, but we'll watch the veterinary hospital's Facebook page to see if they post any further information and, hopefully, more photos of this interesting dog.


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Since calico and tortiseshell cats are girls does this hold true for fogs and other animals...

January 24 2014 at 10:18 AM Report abuse rate up rate down Reply
Sarah Shingleton

As to the chimera cat, if you want to ask the owner about the eyes and hearing here's the facebook page. Probably better than assuming you know it all without all the proper information...

January 22 2014 at 11:17 PM Report abuse rate up rate down Reply
Melissa Mimi Fayyazi

The fact that the cat has a blue eye on the orange side, tells me that he is not a chimera. Orange cats have blue eyes as a kitten but they turn green after 3-4 months. This cat just has a rare and unique variant in his pigmentation genes. The cat may also be deaf on the blue eye side.

November 20 2013 at 11:48 PM Report abuse rate up rate down Reply

what an outstanding looking dog. What a beauty!

October 22 2013 at 8:23 PM Report abuse +1 rate up rate down Reply

I just discovered something amazing in reading all of these comments! You ALL are smarter than any scientist, veterinarian, or teaching hospital! Oh my god! I can't believe you all were able to pinpoint what this dog is through a picture over the internet and NOTHING else to go by, but the people who are actually working WITH this dog are so stupid so as not to realize he's just a mosaic lab, or a catahoula leopard dog, or just plain calico! You're all geniuses!

October 10 2013 at 9:08 AM Report abuse +2 rate up rate down Reply

My doxi was like that as a puppy. We always said he was put together with the leftover scraps. You can still see the defined line down his face even through his pink and black nose.

September 08 2013 at 12:42 AM Report abuse rate up rate down Reply

Hopefully this dog will not be used for experiments....

August 24 2013 at 10:48 AM Report abuse rate up rate down Reply
Lisa Lornie

Beautiful dog. I hope he isnt be used for research

August 02 2013 at 4:27 PM Report abuse rate up rate down Reply
Sondra Levers

He looks awesome I have a kanagaroo chewhawa however u spel it his markings I thought awesome and very uniqicei would put a pic on hwre to show u but dont kno how fron my pphonw.

July 31 2013 at 4:54 AM Report abuse rate up rate down Reply

This dog is amazing but I am also concerned that it is at Texas A&M. A "patient" raises an eyebrow. I hope someone keeps an eye out for the dog. Dogs and cats are often subjected to forced injuries so students can fix them and at the end of term are put down.

July 30 2013 at 12:51 AM Report abuse rate up rate down Reply
2 replies to basia.priga's comment

Not true at all about vet patients at vet schools. They only bring in real animals who were hurt.

September 08 2013 at 12:39 AM Report abuse rate up rate down Reply

Vet schools do NOT harm healthy animals for teaching, they are brought injured and sick animals with the owner's understanding that it is a school and the animals are given a chance at surviving and being treated so the students can learn.

October 10 2013 at 8:59 AM Report abuse rate up rate down Reply
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