Almost all of today's guide dogs are Labradors or crosses between Labradors and Golden Retrievers, selected for their health, size, and history working with humans as hunting dogs.

This capability, reported in the medical journal The Lancet, was discovered when a dog reportedly detected cancer in its handler. The dog repeatedly focused on a spot on the owner's leg where a malignant melanoma lesion was later found, helping lead to an early diagnosis.

The sport dates back to the 1800s in France and tests canine agility, discipline, and aggression in protection dogs. This photo essay follows Judo de Loucyn, a 72-pound Belgian Malinois, the sport's preferred breed, as he competes in obstacle clearing, long jumps, and obedience and attack drills in the North American Ring Association Western Regional Trial in Arizona.

Before dogs make it to the high-profile Westminster Kennel Club Dog Show, owners invest money in registering their dog in numerous shows, paying for professional photoshoots, and grooming services. While winning dog shows often doesn't come with cash prizes, it does usually result in more interest in the dog's breeding stock.

While all dogs descend from wolves domesticated and bred for specific tasks by humans at least 15,000 years ago, most behavioral characteristics result from a mix of genetics and environment, which result in diverse canine dispositions within the same breed.

The study gathers health, lifestyle, and genetic data to understand what helps dogs live longer, healthier lives. Findings could also provide human health insights due to our shared surroundings and biology.

DNA tests tell people about their pet’s breed and attempt to predict things about its behavior and health. But for all that these tests might provide some interesting results, they need to be taken with caution. Here's a look at what we can and can't learn from our pets' DNA.

At ports of entry in the US, Customs and Border Protection agents use dogs to sniff for forbidden foods and other items that are known to harbor invasive pests. Agents also physically inspect items such as flowers to prevent entry by species that may harm US agriculture.

This under 10-minute podcast episode dives into the rich, fascinating science behind dogs: From their world-class sense of smell to their domestication from wolves.

In the Middle Ages, hunting was more than a sport—it was a vocation. Hounds were a crucial element of hunting, and wealthy landowners owned hundreds of them. A scribe in the late 15th century recorded more than 1,000 authentic names given to dogs, prompting a historian to speculate this showed just how well dog-handlers knew their animals. See the names here.

Archaeologists are increasingly relying on dogs to help find decaying bodies at burial sites, some of them up to thousands of years old. This is helping archaeologists to detect past remains without ever touching a shovel, which means there's less...

Picasso often featured his photographer's dog, Lump, in paintings, due to an unusually close connection. George O'Keeffe adopted chow chows as companions and protectors in the New Mexico desert. See the pets of Lucian Freud, Frida Kahlo, and more.

Frederick Banting and his graduate student Charles Best were the first to isolate the peptide insulin from dogs. They induced diabetes in the animals and then treated them with this peptide.

Meriwether Lewis was accompanied by his dog, Seaman, a Newfoundland who traveled the entire journey—helping hunt, guarding camp, and even rescuing supplies from a river.

The American Animal Hospital Association provides guidelines, while many states legally require certain vaccines, such as rabies. Vaccinating healthy pets—even indoor-only pets—prevents outbreaks and protects other vulnerable animals, and adverse effects, such as allergic reactions and injection-site irritation, are rare.

A pet trust ensures that an animal receives financial support and care if its owner can no longer care for the pet. Some lucky dogs have inherited millions of dollars from their owners.

A 2023 study identified that packs of dogs located just 16 kilometers (10 miles) apart within the exclusion zone were more genetically different from one another than from stray dogs hundreds of kilometers away. Rather than radiation, this is likely the result of inbreeding within isolated packs.

This list highlights famous White House animals—from Abraham Lincoln's goats, Nanny and Nanko, to Joe Biden's German shepherds, Champ and Major—showing how pets have long been part of presidential life.

The third annual Dog Photographer of the Year Awards announced 12 winners and 48 finalists in categories like Portrait, Action, Studio, and Dogs with People. Prizes include cash, photography gear, a trophy, and more.

Lobo the Siberian Husky lost an agility competition at the Westminster Dog Show in New York City, but won the hearts of the audience after getting off track.

Both environmental conditions and genetic factors shape how long various animals live. For some creatures, colder conditions allow for less energy use and slower aging. Larger animals have fewer predators. While humans don't live the longest, we are a rare species that successfully lengthened its average lifespan over time.

The olfactory epithelium, located high up within the human nose, is home to millions of olfactory neurons. A dog's olfactory epithelium is much larger—and has more neurons—than a human's, which helps to explain the animal's superior sniffing ability.

This type of dizziness is often caused by disorders of the vestibular system, and in dogs is often referred to as "old dog vestibular disease" because it tends to occur in older animals. The condition tends to resolve on its own in days or weeks. Vertigo is less common among cats than dogs, and in felines is typically caused by inner ear infections or other causes including a tumor.

In the 1600s, an English doctor transferred the blood from one dog to another via quills. The procedure ended when one of the dogs died. This article details the early days of blood transfusions, which turned toward humans shortly after the 1666 dog experiment and involved putting the blood of a sheep into a human recipient (who reportedly survived the encounter).

In a viral trend, dogs have been recorded using button boards to seemingly "talk" with humans. Researchers are divided on whether this means dogs have learned language or are engaging in sophisticated behavioral conditioning.

As part of a scientific bet, neurobiology researchers dragged a chocolate bar across the grass and sought to see if a human could track it—she could. This led to a more in-depth experiment on human olfactory capabilities and behavior when other senses were blocked.

Hearing aids have advanced in aesthetics, simplicity, and cost in recent years, but acquiring them can be daunting for first-timers. Experts suggest finding a high-quality audiologist and knowing your rights with medical services. They also recommend buying them sooner rather than later, as hearing issues can compound and grow more costly over time.

The series of competitions in today's version of the Olympic Games are the survivors of years of experimentation. This illustrated guide details some of the sports and creative competitions that didn't make the cut. Some sports were dropped due to their lack of visual appeal, while others were simply too specific, like the swim limited to sailors of the Royal Greek Navy.

Ancient Greece left behind literature and art in which geese, doves, dogs, and the like are seen keeping people company or holding vigil for their return. Were these considered pets as we understand the term today, and where did ancient Greeks fall on the timeless question of cats versus dogs? Did Odysseus let Argos onto the sofa? This magazine article explores evidence of pets and their treatment in ancient Greece.

This interactive allows users to browse for the most searched topics on Google Search since 1999 and provides noteworthy statistics. Topics are sorted by categories, including athletes, movies, reality TV, dog breeds, and sauces.

Seabiscuit's sudden success in the sport has been framed as a classic against-the-odds sports story. One Binghamton University molecular physiologist wanted to go a bit deeper, though, to see how much genetics played a role in the horse's legendary career. Using the horse's silvered hooves, his research team discovered that Seabiscuit's genotype was typically associated with late bloomers, a finding confirmed by the horse's track record.

Alexander Keene Richards was a pioneer in thoroughbred racing in the US in the 1800s, a time when every town with a few thousand people had a horse track. This interview highlights how Richards went to great lengths to perfect horse breeding.

Humans learned to domesticate dogs long before they formed the concept of private property. But by the era of the ancient Greeks and Romans, property law and ownership became more sophisticated.

Through the creation of tiny sensors easily placed on their bodies, birds have served as research assistants for various scientists. With untold numbers of birds sending back data, researchers have achieved greater insights in long obscure areas of meteorology, ecology, and more. For example, weather scientists use high-flying birds to outline the height of the planetary boundary layer, while conservationists track gulls to protect migrating whales. Learn more here.