Fat Pets: How to Slim Down Man's Best Friend

I put down the chainsaw, weedwhacker and snowblower for a bit to report on a matter affecting the four-legged residents meandering about our houses.

As we describe in today's WSJ story, more than half of the nation's dogs and cats are now overweight or obese. That's leading to all sorts of scary, and expensive, problems with animals' health, from high blood pressure and diabetes to cancer.

How can you tell if your pet's in trouble? More important, how can you fix it? Read on here - and see some of the latest gear designed to help pets shed pounds in this Good Morning American segment above.