Unexpected colors or even traits like missing tails don't necessarily indicate that a dog isn't purebred, research on "hidden" genetics suggests.

When combined with DNA identification, dogs trained to sniff out the scat of endangered lizards could offer a new noninvasive way to protect them.

Raw food for dogs contain drug-resistant bacteria, research finds. And those nasty bugs can go from pup to person.

It may seem obvious that genes can shape the behaviors of different dog breeds, but evidence hasn't always backed that up.

A unique motion may let parvovirus, which usally affects dogs, infect multiple different species, from cats to raccoons.

Humans aren't the only ones who can get autoimmune encephalitis. Dogs are at risk, too.

New research on the prevalence of overweight dogs in Denmark suggests a link between overweight dog owners and the use of dog treats as "hygge-candy" or "cozy-candy."

Why do we have coyotes in America but not saber-toothed cats? A look at the teeth of ancient creatures trapped in the La Brea Tar Pits may clear things up.

Fireworks and other hazards can be tough for dogs on the Fourth of July. Here's how to keep them safe.