Heterochromia is more common in dogs than in people, and it's as cute as can be! At Environmental Graffiti, see 15 adorable dogs looking at you with puppy dog eyes -one blue and one brown, mostly. Link
One ugly web page with thumbnails: http://desli.de/7HB
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Growing up as a kid, our family dog had one eye that was two different colours.
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My dog, too -although in her case, I believe it was injury-generated. One side of her face was bashed in somehow before we got her. Her snout is crooked, her eyes on that side is pale blue, and she shows some weird behavior that could be brain damage. But she's a sweet dog!
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Our dog has partial heterochromia - http://bikerray.imgur.com/all/ It generates a lot of comments, from "looks scary" to "is she blind". Good way to meet people, though!
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