In the ultimate weight loss competition, 12 robust pets undergo a dramatic transformation. It's meant for only the strongest of the strong and the cutest of the cute. They'll go head-to-head (and paw to paw) to fight animal obesity. With the help of a charity in the UK, the pets will undergo a strict six-month diet and exercise program tailored to individual needs in a rivalry similar to 'The Biggest Loser.' InsideEdition.com's Keleigh Nealon (http://twitter.com/KeleighNealon) has more.