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You’ve probably been told countless things about dogs that sound perfectly reasonable. Your neighbor mentioned that warm nose equals sick dog. Your grandmother swore one dog year equals seven human years. Social media convinced you that some breeds are truly hypoallergenic. But here’s the thing that might shock you: veterinarians are quietly pulling their hair out because many of these “facts” are complete nonsense, and they’re tired of explaining the same myths over and over again. These persistent beliefs aren’t just harmless old wives’ tales – they can actually impact your dog’s health and wellbeing in ways you never imagined.
#13 A Warm, Dry Nose Means Your Dog Is Sick
This myth probably causes more unnecessary panic than any other dog-related belief. The common belief that a healthy dog has a cold, wet nose and a sick dog has a hot, dry nose is FALSE. Your dog’s nose temperature fluctuates constantly throughout the day, just like yours does.
The temperatures of dogs’ noses fluctuate day to day, even hour to hour, and this can depend on everything from the weather to what they’ve been doing recently. Some pups have naturally warmer or dryer noses, and this can be perfectly normal for them. This is more common with older age, or in dog breeds with shortened snouts like Pugs or Bulldogs. Instead of obsessing over nose temperature, watch your dog’s overall behavior and energy levels.
#12 One Dog Year Equals Seven Human Years
Contrary to popular belief, dogs do not age at a rate of 7 human years for each year in dog years. This oversimplified formula has been around since the 1950s, but it’s wildly inaccurate. One explanation for how this formula got started is that the 7:1 ratio seems to have been based on the statistic that people lived to about 70, and dogs to about 10. “My guess is it was a marketing ploy,” says William Fortney, a veterinarian at Kansas State University.
The reality is far more complex. Compared to humans, dogs race through their early years. When dogs reach 1 year old, they are developmentally similar to a 15-year-old human teenager. And by their second birthday, most dogs are more or less comparable to a fully mature 24-year-old person. After that, their aging slows down considerably, and the rate depends heavily on their size and breed.
#11 Dogs Are Colorblind
Time to put this black and white thinking to rest. Dogs cannot see the world in full technicolour like we can, dogs can see some colours. Their eyes detect fewer colours than ours, so their perception is similar to humans with colour blindness. They can tell the difference between blue and yellow, but see green and red as shades of grey.
Dogs can perceive color, but not every color, and as a result, they do not see color as vibrantly as we do. Dogs can only see shades of blue, yellow, and green and their vision is blurrier in brighter light. They make up for their sight disadvantages with their incredibly strong sense of smell, though. So your dog isn’t living in a sepia-toned world – they’re just seeing it through a different lens than you are.
#10 Dogs Have Cleaner Mouths Than Humans
This myth makes veterinarians cringe every time they hear it. Dogs’ mouths contain almost as many bacteria as humans. It’s difficult to determine which is “cleaner” because the bacteria found in a dog’s mouth are different than the bacteria in a human’s mouth. Think about what your dog does with that mouth throughout the day.
They lick themselves, eat questionable things off the ground, and investigate other dogs’ business in ways that would horrify humans. Think about all of the bacteria that exist in that mouth getting transferred to the wound. Dogs’ mouths contain a lot of bacteria, which can be transferred to wounds when they lick them. Licking wounds can cause infection and delay healing. So maybe think twice before letting them give you those enthusiastic face kisses.
#9 Female Dogs Need to Have One Litter Before Being Spayed
This persistent myth has absolutely no scientific backing and can actually harm your dog’s health. This is an old wives’ tale. It’s also a myth that female dogs need to have one litter before spaying. Dogs are unable to feel broody, and allowing them to have one litter before getting them neutered has no proven health or behaviour benefit for them.
There is no evidence to support that having a litter of puppies before getting spayed reaps any long-term health benefits for female dogs. In reality, spaying a dog before her first heat cycle actually decreases many health risks such as developing mammary tumors or uterine infections. The sooner you spay your female dog, the better protected she’ll be from serious reproductive health issues.
#8 There Are Truly Hypoallergenic Dog Breeds
Sorry to burst this bubble, but there is no dog that is truly hypoallergenic. Some dogs may create a greater allergic response than others, but no dog is completely hypoallergenic. This misconception has led countless people to adopt dogs thinking they’ll be fine, only to discover their allergies are still triggered.
There is no such thing as a hypoallergenic dog. Most people think that allergies come from a dog’s fur, but it actually comes from a protein in a dog’s saliva and urine that sticks to dogs’ skin and sheds with their fur. Dogs who have hair (instead of fur – Poodles for example), or dogs who don’t shed are better choices for people with allergies. In these breeds, the allergy-causing protein isn’t released as often due to the dog not shedding as much. So, “hypoallergenic dogs” shed fewer allergens into your home and the air, but they aren’t actually hypoallergenic.
#7 Dogs Don’t Feel Guilt or Shame
That guilty look your dog gives you after destroying your favorite shoes? It’s not actually guilt. Have you ever come home to find your pet has chewed up your child’s favourite cuddly toy, or has made a mess on the carpet? The look on their face is not guilt, but you could be forgiven for thinking it is. Owners often mistakenly believe their dog knows they have done wrong, but what you’re actually seeing is appeasement behaviour. Dogs that look guilty are simply responding to an owner’s disappointment, upset or anger.
Animals do not experience emotions such as “spite,” nor do they, generally, feel “guilty” when we yell at them – although they may look it. Most of the time, animals destroy things because they’re bored and were looking to entertain themselves when no one else was around. That hangdog expression is actually your pup trying to appease you because they can sense you’re upset, not because they understand they did something wrong.
#6 Dogs Eat Grass Because They’re Sick
This myth has been around forever, but the science doesn’t support it. Less than 25% of dogs vomit after eating grass, and only 10% show signs of illness before eating grass. So, chances are, in most cases, the two behaviors are unrelated. Dogs eat grass just to eat grass, get roughage, and be dogs.
Eating grass is a common bugbear of dog owners. It’s also a common belief that dogs eat grass to make themselves sick (usually to get rid of something nasty they’ve swallowed). Others think grass eating is a sign of a lack of some nutrients, but studies have shown this is not the case. In fact, dogs eating grass is much more likely to be because it tastes nice, particularly in the spring and summer months when it’s green and fresh. Sometimes they just want a salad, not a stomach remedy.
#5 Dogs Don’t Need Vaccines After Their Puppy Series
The idea that dogs don’t need them after their puppy series is flat-out wrong. The booster shots help protect against dangerous diseases like rabies and parvo, and skipping them can put dogs at risk. This dangerous misconception has been growing, especially since the COVID-19 pandemic.
About 6 in 10 veterinarians say that more pet owners are turning down rabies shots or other core vaccinations for pets after the COVID-19 pandemic, according to a survey. Vaccines work by maintaining your dog’s immunity against potentially fatal diseases. Rabies is almost always lethal to pets (and people) once symptoms start. That’s why the rabies shot is required by law in most states, under penalty of fines, or even euthanasia if an unvaccinated pet bites someone.
#4 You Need to Be the “Alpha” or “Pack Leader”
As dogs are descended from wolves, people started to apply this theory to dog training. But science has moved on and this theory has now been debunked by scientists. In fact, so much more is known about wild wolves now. The whole alpha theory was based on flawed research from decades ago that studied captive wolves in unnatural conditions.
Wolf packs usually comprise of two parents and their offspring. Older generations may stay on with the pack, or leave to make their own. This is very different to the social structure of dogs who, although are very social, do not form packs in the same way as wolves do. Modern dog training focuses on positive reinforcement and building a relationship based on trust and communication, not dominance and fear.
#3 Indoor Cats Don’t Need Flea Prevention
Many dog owners also have cats, and this myth affects both species. This may come as a surprise to strictly indoor cat parents – but yes, your furball still needs regular flea prevention! Fleas thrive in regulated indoor temperatures and can catch rides inside on humans. Plus, flea eggs and larvae can remain dormant inside carpet fibers or floor cracks for months, just waiting to hatch. Don’t take chances with parasitic infestations – maintain your cat’s monthly preventatives.
Believe it or not, 95% of the fleas in your house at any given time do not live on your pet. The vast majority of fleas in an environment aren’t adult fleas, which is what you are likely to see when you’re looking for them on your pet. However, these problematic little creatures spend most of their time in the house as “babies” – eggs, larvae, and pupae. Just one adult female flea can lay up to 2,000 eggs in her short lifetime, so finding a single flea can be a problem.
#2 Dogs Don’t Feel Pain Like Humans Do
One troubling myth suggests that pets like dogs and cats don’t actually experience pain simply because they rarely yelp or vocalize obvious distress. However, researchers acknowledge most animals demonstrate high pain tolerance due to prey animal instincts to mask vulnerabilities. This dangerous belief can lead to under-treatment of painful conditions.
One troubling myth suggests that pets like dogs and cats don’t actually experience pain simply because they rarely yelp or vocalize obvious distress. However, researchers acknowledge most animals demonstrate high pain tolerance due to prey animal instincts to mask vulnerabilities. Just because your pet isn’t crying doesn’t mean they aren’t suffering silently. Stay alert for subtle signs of discomfort and never hesitate to call your vet. Dogs are masters at hiding pain, which made sense for their wild ancestors but can be problematic for modern pet care.
#1 Raw Diets Are Always Better Than Commercial Dog Food
As domesticated dogs evolved from living in the wild to sharing their humans’ homes and beds, their digestive systems changed. Modern dogs are entirely different from their wild ancestors, and research has shown absolutely no benefit to feeding them a raw diet. Conversely, multiple studies have shown that feeding pets raw or undercooked food poses health risks to both animals and humans. Keeping your dog on a well-balanced, nutritionally complete pet food is safer and healthier than feeding them a raw diet.
Raw diets can harbor dangerous bacteria like Salmonella and E. coli that can make both you and your dog sick. While the Instagram photos of raw meals might look impressive, We recommend these companies because they have been scientifically proven to be safe and well-balanced and come in a wide range of special formulas for specific diseases. When we suggest something for your pet, it’s always for their benefit, not our own. Commercial dog foods go through rigorous testing and quality control that home-prepared raw diets simply can’t match.
Conclusion: The Truth Sets Your Dog Free
These myths persist because they seem logical on the surface and get passed down through generations of well-meaning dog owners. But veterinarians deal with the real-world consequences of these misconceptions every single day. They see dogs whose owners delayed medical care because of a “normal” wet nose, or dogs suffering from preventable diseases because of vaccine hesitancy. The good news is that once you know the truth, you can make better decisions for your furry friend’s health and happiness.
Your dog doesn’t need you to be their “alpha” – they need you to be their advocate, their source of consistent care, and their loving companion. They don’t need to suffer through a litter before being spayed, and they definitely don’t need you to panic every time their nose feels a little warm. What they do need is an owner who seeks out accurate, science-based information and works closely with a trusted veterinarian.
The next time someone shares one of these myths with you, you’ll know better. And your dog will be healthier for it. Isn’t that what really matters in the end?
Worried about unexpected vet bills?
Pet insurance can cover thousands in unexpected vet costs. Get a free quote from Lemonade in under 2 minutes.
Get My Free Quote →Sponsored · Opens Lemonade.com
