Hill's Pet Nutrition announced its 2011 PetFit Challenge dog and cat weight loss contest.

The PetFit Challenge will award one cat finalist and one dog finalist with a trip to a special location to win up to US$1 million and meet Alison Sweeney, host of "The Biggest Loser." Consumers should share success stories of how their pet lost weight with Hill's weight management foods, including before and after photos. For more information or to submit an entry, click here.