Here’s something surprising: small dogs tend to live longer than big ones. Breeds like Chihuahuas, Toy Poodles, and Jack Russell Terriers can often reach 15 to 18 years, while large breeds like Great ...

We asked scientists from the Dog Aging Project for practical tips to improve your dog’s lifespan—from what to feed them to exactly how often they need a walk. Dog owners take their pets for a swim at ...

If you’ve ever noticed your friend’s tiny Chihuahua still bouncing around well into its teens while your neighbor’s Great Dane started slowing down after just a few years, you’re not imagining things.