Because April is Dog Appreciation Month AND Canine Fitness Month, I’ve been posting about dogs on FaceBook almost daily. But there are dozens more—different—fun facts about dogs out there, and not enough April days left to share them. So, for your reading pleasure, from across the web:

There are over 75 million pet dogs in the U.S.—more than in any other country—and a third of ALL households around the world have a dog.

Part of the Family

Forty-five percent of dogs sleep in their owner’s beds. Here’s hoping they share the blanket!

Seventy percent of people sign their dog’s name on their holiday cards. If you want your dog to actually sign, use a nose print. Dog (and cat) nose prints are unique.

A study at UCSD claims that your dog can genuinely get jealous when they see you display affection for another creature.

Dogs can experience separation anxiety. If this is true of your dog, try leaving some clothing you’ve worn with your pet. It’s been proven that the scent you leave behind on your clothes can help ease your dog’s separation anxiety.

Yawning is contagious — even for dogs. Research shows that the sound of a human yawn can trigger a yawn from a dog. And it’s four times as likely to happen when it’s the yawn of a person the pet knows.

Dog Sensitivity

Dogs have wet noses for a few reasons. The moisture helps to absorb scent chemicals, sweat glands on the snout help regulate temperature, and many dogs lick their noses to clean them or taste dirt that may be there.

Dogs’ noses can sense heat and thermal radiation, which explains how blind or deaf dogs can still hunt.

A dog’s sense of smell is legendary, but did you know that their nose has as many as 300 million scent receptors? In comparison, a human nose has about 5 million. Your dog can smell 40 times better than you can.

Up to 30% of a dog’s brain may be dedicated to analyzing odors at any time.

The Bloodhound ’s sense of smell is so accurate that law enforcement agents can use the results of its tracking as evidence in some courts of law. An old Scottish word for this type of dog was “sleuth-hound” from which we derive the word “sleuth” for a detective.

Your dog can smell your feelings. In fact, your dog’s sense of smell is approximately 100,000 times better than yours. So it shouldn’t be shocking that they can in fact, smell things such as fear. When a human is fearful, they perspire, and a dog is easily able to pick up on this change.

Dogs can be trained to detect cancer and other diseases in humans. Cancerous cells release different metabolic waste products than healthy cells in the human body. Dogs may even be able to sniff out cancer cells simply through smelling someone’s breath.

All puppies are born deaf. As they get older, they can hear 4 times better than humans.

Adult dogs have fantastic hearing! They can detect high-pitched noises and spot sounds from much further away than humans can.

Dogs are not color-blind. They can see blue and yellow.

Dogs don’t see in as much detail as humans. Perfect sight for a human is 20:20, but for a dog, it’s 20:70 or 20:80. However, dogs track movement better than people because of a structure in their eye called a visual streak, which humans don’t have. So they’re very good at seeing horizontal movement and tracking it, even if visually they might not be able to make out what, precisely, is moving.

Dogs have about 1,700 taste buds. (We humans have between 2,000 and 10,000.) However, dogs are more sensitive to impurities in water than humans are, making it very important to ensure your dog always has access to clean, fresh water.

Dog Intelligence

Dogs have a sense of time. They have proven in multiple studies that they know the difference between one hour and five. Often they can predict future events, such as regular walk times.

Dogs can also “tell time” from scent. Your dog will start getting excited or more active around the time you come home from work each day. They do this because we are creatures of habit and are typically gone the same amount of time every day. When we leave our scent in the house, it fades over time; when we get home, that scent is at a certain level. Dogs become conditioned that we will return when our scents hit that lower level.

Your dog is as smart as a two-year old! Ever wonder why children around this age seem to have a special bond with the family dog? It could be because they speak the same language, roughly 250 words and gestures.

Not all mammals understand pointing but dogs and humans do. Dogs even understand pointing when you do it with your eyes and not your hands.

Stray dogs in Russia have learned how to ride the subway system, and get off at specific stops in search of food.

From their ears to their eyebrows, shoulders, and tail, dogs use signals and smells, as well as sound, to communicate! Their posture makes a big difference, too.

Dog Health

Dogs mostly pant to cool themselves. They have sweat glands between their toes; sweaty paws dogs help to stay cool. This also gives them the added benefit of a better grip.

Dogs have three eyelids. They have upper and lower eyelids, but also a third eyelid underneath, known as the nictitating membrane. This membrane serves multiple functions, including clearing the cornea of any particles or debris, producing tears, and acting similarly to a lymph node to battle potential infections. 

A majority of strays that end up in shelters are pets who are lost simply because they don’t have any identification. Additionally, Fourth of July is the busiest time of year for animal shelters: many pets are so frightened of loud fireworks that they run away.

Chocolate can be deadly to dogs due to containing the ingredient theobromine. Dogs cannot metabolize theobromine, and ingesting chocolate could cause a severely toxic buildup in their system, which could become fatal. American chocolate is bad but not typically lethal.

Xylitol is super poisonous. This includes gum, toothpaste and rarely peanut butter. A stick of gum is usually an ER visit, a handful of Hershey’s kisses is usually not deadly.

Health Benefits of Dogs for Humans

Petting a dog can actually benefit your physical and mental health. Studies have shown that petting a dog for 15 minutes can lower blood pressure by 10%, combat loneliness, and help lower feelings of stress and depression.

Children living in a home with a pet dog tend to develop stronger immune systems and have lower incidences of asthma. Scientists speculate this is a result of being exposed at an early age to allergens and bacteria that a dog introduces to the home.

Human blood pressure goes down when petting a dog. And so does the dog’s.

Many dogs undergo intensive training to work as guide dogs, helping blind people get around safely. Others are assistance dogs, who keep their owners calm and safe, warn of impending medical emergencies, or assist with daily tasks.

Sleeping Dogs

The average dog sleeps for about half of every day, or around 12–14 hours. That figure is higher for puppies, older dogs, and larger breeds.

A dog’s sleeping patterns are nearly identical to a human’s. Like us, they go through three phases during NREM sleep and also experience REM sleep. However, a dog’s sleep cycle is a lot shorter than ours: while we go through an average of five cycles a night, a dog can go through 15-20 cycles.

All dogs dream, but puppies and senior dogs dream more frequently than adult dogs.

Dogs can be unpredictable if they’re woken suddenly. They may bite or nip purely as a reactive response to being startled, so it’s always better to let your sleeping dog lie. If you really have to rouse them, do it with a gentle voice – not a hand. But don’t wake them from a bad dream, as they may react badly.

One reason for your dog snoozing on their back, paws in the air may be because s/he feels safe and secure, showing total trust. There’s also a possibility that your dog is too hot, particularly in the summer. There’s less hair on their belly, so heat can leave their body more easily. Plus, as dogs sweat through their paws, in this position they’re catching a breeze.

A dog sleeping on its side also indicates they are feeling relaxed and comfortable. It’s another sign of trust, and a dog will often enter REM sleep and dream in this position.

Dogs curl up in a ball when sleeping to protect their organs — a holdover from their days in the wild, when they were vulnerable to predator attacks—but it is also a way to conserve heat.

Special Dogs

Rin Tin Tin, the famous German Shepherd, was rescued from a bombed-out dog kennel in France during World War I. After the war, he was brought back to the U.S., where he (and his offspring) starred in 27 movies. He was nominated for an Academy Award in 1929.

Three dogs survived the historical sinking of the Titanic in 1912: a Pekingese named Sun Yat Sen, a Pomeranian named Lady, and another unnamed Pomeranian. All three sailed in First Class cabins.

The Guinness Book of World Records names Bluey, an Australian cattle dog, as the oldest dog to ever live. Bluey lived to be 29 years 5 months old and lived from 1910 to 1939.

The town of Idyllwild, California elected their first mayor in 2012, Mayor Max. But Max wasn’t just any regular mayor, he’s a Golden Retriever! Although Mayor Max passed away in 2013, the town elected Mayor Max II in 2013, and Mayor Max III in 2022. Way to go, Mayor Max!

According to Guinness World Records, a Great Dane named Zeus was the world’s tallest male dog ever. Zeus was 3 feet, 5.18 inches tall. He could drink from the kitchen sink, and his family has to buy a larger vehicle to fit him better.

What about the shortest dog? Guinness World Records gives that title to Pearl the Chihuahua. She measures 3.59 inches tall.

Interesting Breeds

Dachshunds were originally bred to fight badgers. In fact, their name means “badger dog” in German!

Newfoundlands make great lifeguards because they have water-resistant coats and webbed feet. They can also swim for unusually long distances, even while pulling a would-be drowning victim to safety.

Dalmatian puppies are born completely white; they develop their spots as they get older.

Maltese dogs have hair instead of fur. This means that, although their hair falls out like a human’s does, they do not shed fur and dander. Thus, they are ideal pets for allergy sufferers.

The Labrador Retriever has been on the AKC’s top 10 most popular breeds list for longer than any other breed. It is originally from Newfoundland, descending from the St. John’s Water Dog.

The French Bulldog was first named the most popular breed in 2022 .

The name Collie has disputed origins.

• It may stem from the black-faced mountain sheep common in Scotland, called “coollies.”
• A Northern English dialectal term for coal is coaley, possibly referring to the breed’s black patches.
• In Old Gaelic, collie was a rural description of anything useful, which Collie dogs assuredly are. Collies are still among the most popular herding dogs today!
• Another potential Gaelic root, cuilein, means a puppy or cub.
• The Scandinavian name Colle was often used to refer to any dog in Medieval English, as seen in Chaucer’s works.

Chow Chow and Shar-Pei are the only two dog breeds with fully black tongues. I couldn’t find any explanation for why this trait was bred into these dogs.  According to one legend, the Chow Chow’s tongue turned blue while it was helping a monk paint the night sky.

The Dandie Dinmont Terrier is the only breed named for a fictional person, a character in the novel Guy Mannering by Sir Walter Scott.

The Australian Shepherd is not actually from Australia. In fact, they are an American breed.

A person who hunts with a Beagle is known as a “Beagler.” (Not to be confused with a “Beaglier” dog, which is a cross between a Beagle and a Cavalier spaniel!)

Basenjis don’t bark. Instead they yodel (called a “barroo”), whine, and occasionally scream as a means of communicating. Their barkless traits have earned them a nickname: “The African Barkless Dog.” 

The Norwegian Lundehund is the only dog breed created for the job of puffin hunting.

Greyhounds can beat cheetahs in an extended race. While cheetahs can run twice as fast as Greyhounds, they can only maintain that 70 mph speed for about thirty seconds. A Greyhound can maintain a 35 mph speed for about seven miles. The cheetah may start out first, but the Greyhound would soon overtake them.

And then there are working dogs: sled dogs, herders, trackers, search and rescue specialists, drug (or other) sniffers at airports, hunters, racers….

Dog Miscellany

When your dog is carefully choosing the perfect place to do their business, they may be leaving a message for other dogs, finding a surface they prefer, looking for a safe spot, or simply prolonging their time outside. They may even prefer to poop in alignment with the Earth’s magnetic field!

When dogs kick backward after they go to the bathroom, it’s not to cover it up, but to mark their territory, using the scent glands in their feet.

Dogs share 99.9% of their DNA with wolves. The Alaskan Malamute and Siberian Husky may have the closest DNA to their wild cousins.

Like right-handed and left-handed humans, most dogs have a dominant paw. To figure out which one it is, note which paw your dog most often starts with when getting up and walking.

A study shows that dogs are among a small group of animals who show voluntary, unselfish kindness towards others without any reward.

Dogs are able to breathe out through their mouth and nose at the same time. Their noses can separate air for sniffing and air for breathing. A dog’s nostrils are also able to move air out of their lungs while simultaneously moving air in across their scent receptors!

More than half of U.S. presidents have had at least one dog during their time at the White House. And then there’s Calvin Coolidge, who had at least 12!

The term “man’s best friend” was coined for a hound dog named Old Drum. A neighbor shot him, and his owner took the neighbor to court and proceeded to give one of the finest speeches defending the relationship of humans and dogs. This speech is forever immortalized on a plaque in front of a hound statue, located in front of the court house in Warrensburg, Missouri. The speech is available online. If you want to know more, look up “Burden vs Hornsby Old Drum”.

So, while I searched broadly, being totally comprehensive wasn’t possible. There are always more things to learn about dogs. Enjoy exploring!

Bottom Line: Dogs are useful, complex, fascinating, and—dare I say decorative? There’s lots to appreciate about dogs, all through the year!