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Photograph by Justin Guariglia
They may look small and cute, but dachshunds, like these three looking out of a pickup truck in Arizona, are pretty tough. They were first bred hundreds of years ago in Germany to hunt badgers and wild boar. -
Photograph by Joel Sartore
An Afghan hound with windblown hair in Lincoln, Nebraska, poses for the camera. These proud-looking dogs were bred in the mountains of Afghanistan and are known for their speed, strength, stamina, and long, thick hair. -
Photograph by Richard Olsenius
A professional dog walker takes her pooch parade through New York City's Central Park. Dog walkers are common in big cities, where apartment living means many dog owners need help with their hounds during the day and when they're on vacation. -
Photograph by Nadia Hughes
Two Dalmatian dogs blend in with a checkered kitchen floor in Takoma Park, Maryland. Dog historians aren't sure where Dalmatians first came from, but the breed has been around for hundreds of years. -
Photograph by Richard Olsenius
Great Danes line up for judging at the Crufts Dog Show in Birmingham, England. These huge hounds are some of the biggest dogs on the planet. -
Photograph by Melissa Molyneux
A yellow Labrador retriever named Preston watches the scenery during a trip to the park in New Jersey. -
Photograph by Joanna Pinneo
Golden retrievers are known as friendly, gentle, and trustworthy dogs. These traits make them very popular as family dogs. They're also hardworking—this one is a member of the snow patrol at a ski resort in Park City, Utah. -
Photograph by Bill Curtsinger
Labrador retrievers, like this one chasing a toy into a pool in Yarmouth, Maine, are water-loving dogs. They were first bred in Newfoundland (not Labrador!), Canada, to fetch birds and other animals shot by hunters. -
Photograph by Cameron Lawson
A team of sled dogs takes a break on Wonder Lake in Alaska's Denali National Park. Many different breeds are used as sled dogs, but in Alaska, the most popular are Siberian huskies, such as these pups. -
Photograph by James Vanhoose
A member of the 4-H Dog Drill Team in Columbia, Missouri, gets some love from her pet collie as other team members look on. Collies were first bred hundreds of years ago in England and Scotland as herding dogs. They are loyal and affectionate and are always among the most popular of family dogs.

