25 amazing animals with different colored eyes or heterochromia

What causes Humans or animals to have heterochromia?  Well, science does know the reason yet, it is assumed that genetics play a major role.  However, in some people an animals this can also be cause by certain types of diseases or injuries.  What is known, however, is that is a lot more common on animals, specifically cats and dogs.  Here are 25 amazing animals who have different colored eyes.