Princes William & Harry's Animal InstinctsThe young princes have spent their lifetimes loving and helping the world's creatures

Credit: Mike Forster/REX

Updated: Wednesday Jun 23, 2010 | 03:00 AM EDT By: Kate Hogan

DOG DAYS

Ahh, sibling rivalry. William and Harry fight for the affection of one very lucky pup in a photo from August of 1987, taken on the Majorca island of Spain.