If your dog's offensive aroma doesn't come from the mouth or ears, he may have a problem. Canine body odor isn't necessarily normal, despite the existence of the term "doggy odor." If you know that your senior pooch hasn't rolled in something disgusting, his embarrassing (to you, not to him) aroma may reflect one of several conditions.

A common cause of canine stinkiness is seborrhea, a condition that also can cause hair loss, flaking, and greasy skin. Certain metabolic diseases may also cause your four-legged friend to smell foul. If the odor comes from a wound, suspect infection. Body odor is also symptomatic of cancer.

In any case, a Fido with B.O. needs to be evaluated by a vet -- not only for his sake, but also for the sake of his people.