Take the photo again, this time with some decent lighting and no flash. Problem with that pic isn't just the eyes, it's the overexposure on the fur and the tongue.
But if you're really interested in sorting out the eyes, pic up a copy of Photoshop Elements, or download a copy of GIMP if you're into freeware. There will be plenty of tutorials online on how to fix eye colour, and that shouldn't be hard to do.
Good luck