DIANE SAWYER (ABC NEWS)(OC): And finally here, we've long known about the ability of dogs to lift our spirits, heal the soul. But tonight, something new. Very specific physical ways your four-legged pal can improve your family's health. Here's ABC's Cecilia Vega.
CECILIA VEGA (ABC NEWS)(VO): What if you could trade everything in your medicine cabinet for this?
DOCTOR MARTY BECKER (AUTHOR OF "THE HEALING POWER OF PETS"): It's basically, you know, a furry, four-legged life support system cleverly disguised as a pet. So what I'm telling you, it might be poodle instead of Prozac. It might be Labrador instead of lipitor and it might be beagle instead of benacar.
CECILIA VEGA (ABC NEWS)(OC): And anaconda instead of aspirin.
DOCTOR MARTY BECKER (AUTHOR OF "THE HEALING POWER OF PETS"): And anaconda.
CECILIA VEGA (ABC NEWS)(VO): Veterinarian Marty Becker wrote a whole book about the healing power of pets. And now scientists in San Francisco think they, too, may be on to something. They say dust found in homes with dogs may actually make kids less likely to develop asthma. The benefits of having Alex George, Raven, Lightning and Sheldon the labradoodle don't end there. So much for an apple a day. Australian researchers discovered people with dogs visit the doctor less.
CECILIA VEGA (ABC NEWS)(VO): One study found that simply watching this old girl calmed nerves. That connection with animals thought to trigger a drop in chemical levels linked to stress. Have heart disease? You might want to consider getting a cat. Researches in Minnesota found those who never owned one were 40% more likely to die from a heart attack. The calming purr might actually sooth anxiety.
DOCTOR MARTY BECKER (AUTHOR OF "THE HEALING POWER OF PETS"): It's that close physical contact, that affection connection that we share. That's where you get the healing power of pets.
CECILIA VEGA (ABC NEWS)(VO): Fido may be our anti-depressant, our cholesterol killer, our lifesaver. Now if only man's best friend could help solve world peace. Who knows, maybe they can. Cecilia Vega, ABC News, Los Angeles.
DIANE SAWYER (ABC NEWS)(OC): And everybody reduces stress