If you’ve ever owned a pet – or even just existed on the same planet as one – you’ve probably heard a long list of “facts” that sound convincing, get repeated constantly, and turn out to be… completely wrong. 😄

From goldfish with supposed three-second memories to cats living their best lactose-intolerant lives, pet myths have a way of sticking around long after science has politely (and repeatedly) debunked them. So let’s have some fun with it.

Here are some of the most common pet myths we’ve all heard and what’s actually going on behind the scenes.

1. “Milk is Good for Cats”

We’ve all seen this scene in cartoons. A little kitty is hungry, and the first thing they give it is milk. And just like that, we learned that cats love milk. We carried this belief with us, thinking we were doing something nice when, in reality, we were basically harming the kitty.

Well, the truth is that most cats are lactose intolerant. Kittens should only drink their mother’s milk or another cat’s milk, and if that’s not an option, a special formula made for kittens.

So yes, give a cat a bowl of milk, and you might end up with… consequences. Unpleasant ones. For everyone involved.

2. “Dogs Should Chew on Bones”

This myth has caused more trouble than most people realize. It also spread through movies and cartoons – we’ve always seen dogs with a bone in their mouth, or even hiding it for later.

They seem to love it. But that doesn’t mean it’s good for them.

Cooked bones, in particular, can splinter and cause serious injuries to a dog’s mouth, throat, or digestive system. Even raw bones come with risks if they’re not chosen carefully.

The idea of a dog happily chewing on a bone is deeply ingrained-but safer alternatives, like specially designed chew toys, are a much better option.

Your dog may still dream of being a wild hunter, but their digestive system would prefer something a little less… messy.

3. “Goldfish Can Live in a Glass Bowl”

As we already talked about in another article, goldfish need at least 30-40 liters of water in order to thrive. So those glass bowls we’ve all seen as kids? They are only for decorative purposes, as they are so small that nothing can actually live in them.

Those bowls are basically the worst possible home. They lack proper filtration, oxygen levels are often low and unstable, and waste builds up quickly. It’s like asking someone to live in a closed room that only allows a couple of steps, with a small amount of oxygen that’s constantly running out, while polluted air builds up.

So no, goldfish don’t die quickly because they’re fragile, they die because we accidentally create terrible living conditions for them. Give them a proper tank, clean water, and some care, and your bestie will keep you company for years.

Which leads us to debunk another myth: goldfish don’t only live for a couple of months or years. If kept correctly, they can live more than 10-15 years – some even up to 30, depending on the species.

4. “Goldfish Grow to the Size of Their Tank”

This one sounds logical, but it’s actually a misunderstanding.

Goldfish don’t “adapt” their size to fit their environment in a healthy way. What really happens is that poor conditions can stunt their growth, which is not the same as “staying small.” Internally, their organs may continue developing while the body doesn’t, leading to serious health problems.

So no, your goldfish isn’t politely choosing to remain tiny. It’s more like it’s being held back by its environment. Not ideal.

5. “Cats Always Land on Their Feet”

Cats are impressive. Their reflexes are incredible. But they are not tiny, indestructible superheroes.

Yes, cats have a “righting reflex” that helps them twist mid-air and land on their feet. However, this doesn’t mean they walk away from every fall like action movie stars.

Falls from certain heights can cause serious injuries. There’s even a term “high-rise syndrome” used by veterinarians to describe the injuries a cat can suffer after falling from the second story of a building or higher.

So while cats are graceful, they’re not immune to gravity. Physics still applies.

6. “Dogs Only See in Black and White”

For years, people imagined dogs living in a gloomy grayscale world, like an old movie.

In reality, dogs do see color just not the same range as humans. Their vision is dichromatic, meaning they can see shades of blue and yellow. They also perceive shades of grey. However, colors like red, green, and orange are not part of the spectrum they can distinguish.

So your dog isn’t missing out on color entirely. They’re just experiencing a slightly different version of it. Honestly, they probably still think your outfit looks great.

7. “A Wagging Tail Means a Happy Dog”

This one can be dangerously misleading.

A wagging tail doesn’t always mean “I’m thrilled to see you.” It can also signal anxiety, uncertainty, or even irritation.

The key is context. A relaxed body, soft eyes, and a loose wag usually indicate happiness. A stiff posture and a fast, tense wag? That’s a different story.

Think of it like human smiles. Sometimes they mean joy. Sometimes they mean “I’m uncomfortable but trying to be polite.” Same concept.

8. “One Dog Year Equals Seven Human Years”

That’s something we hear a lot, but it’s far from true. Dogs age at different rates depending on their size and breed. Larger dogs tend to age faster than smaller ones.

The first year of a dog’s life is closer to about 15 human years (with giant breeds – over 45 kilos -being closer to around 12), and it varies from there.

If you’d like to find your dog’s exact age in human years, check the table below. 🐾

So the “multiply by seven” rule is more of a rough guess than a scientific formula.

9. “Rabbits Can Eat a Lot of Carrots”

This is a scene we’ve seen in many cartoons as well. Rabbits can indeed eat carrots, and they absolutely love them. But that doesn’t mean they are good for their health in large amounts.

Carrots and other root vegetables should only be given as treats because they have a high sugar content and can lead to problems if given in big amounts, such as teeth issues, weight gain, etc.

If you’d like to learn what you should feed your rabbit, you can read more here. 🐰

Final Thoughts

Pet myths stick around because they’re simple, memorable, and often passed down without question. But understanding what’s actually true helps us take better care of the animals we love.

And honestly, learning the truth is often more interesting than the myth itself.

So next time someone tells you that you should feed milk to a kitty, you’ll know better, and you’ll have great information to share.

Thank you for reading 🐾