They're not alone.
Experts estimate that about one in three dogs and cats in America is overweight.
That means there are some 39 million chubby pets waddling around. Although weight gain occasionally indicates a medical problem, most overweight pets simply eat too much. We give them all these treats and extra food, and then wonder why they're fat. As with people, overweight pets can be plagued by problems such as high blood pressure, diabetes and even arthritis. For Dogs and Cats Begin with the rib test.