<P> An odd - eyed cat is a cat with one blue eye and one eye either green, yellow, or brown . This is a feline form of complete heterochromia, a condition that occurs in some other animals . The condition most commonly affects white - colored cats, but may be found in a cat of any color, provided that it possesses the white spotting gene . </P> <P> The odd - eyed coloring is caused when either the epistatic (dominant) white gene (which masks any other color genes and turns a cat completely white) or the white spotting gene (which is the gene responsible for bicolor and tuxedo cats) prevents melanin (pigment) granules from reaching one eye during development, resulting in a cat with one blue eye and one green, yellow, or brown eye . The condition only rarely occurs in cats that lack both the dominant white and the white spotting gene . </P> <P> As with some newborn mammals, all cats are blue - eyed as kittens, and may change as the newborn ages . The differences in an odd - eyed kitten's eye color might not be noticeable, save upon close inspection . Odd - eyed kittens have a different shade of blue in each eye . The color of the odd eye changes over a period of months--for example, from blue to green to yellow or from green to blue to yellow--until it reaches its final, adult color . </P>

What does it mean when a cat has one blue eye and one green eye
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