5 Common Dog Myths Debunked: Truths Every Owner Should Know

Many dog lovers accept certain beliefs about dogs as fact—such as a wagging tail always meaning happiness or dogs seeing only in black and white. While some of these ideas contain grains of truth, they often oversimplify complex canine behaviours and biology. This article debunks five common dog myths using current veterinary insights, helping you better understand and care for your pet.

1. Dogs Can Only See in Black, White, and Grey

The fact: Dogs have colour vision, but it differs from humans.

Dogs are not entirely colourblind; they have what's called dichromatic vision. This means they perceive primarily blues and yellows and have difficulty distinguishing reds and greens. Their world contains colours, just in a different spectrum from ours. Knowing this is handy, for example, when choosing toys or bedding so your dog can easily spot and enjoy them.

2. A Dry Nose Indicates Ill Health

The fact: A dry nose is not always a sign of illness.

While a cold, wet nose is common in healthy dogs, it's normal for noses to be dry sometimes—such as when a dog wakes up from sleep. Historically, a persistently dry, flaky nose was associated with some illnesses, like canine distemper, because of skin changes. However, a dry nose alone should not cause panic. Conversely, a moist nose doesn't guarantee perfect health, so always consider other signs too.

3. One Dog Year Equals Seven Human Years

The fact: This is an outdated simplification.

Dog ageing doesn't follow a strict ratio. For example, dogs become sexually mature by about one year, which has no human equivalent at that age. Lifespans and ageing vary greatly across breeds and individual dogs. Most dogs reach their major developmental milestones by two years old. Modern research suggests canine age approximations must consider size, breed, and genetics rather than a flat seven-year formula.

4. Bitches Should Have One Litter Before Being Spayed

The fact: There is no moral or biological need for this.

This belief stems from the human tendency to anthropomorphise animals, projecting human social or emotional experiences onto dogs. The idea that a female dog needs to have a litter to be healthy or happy is a myth. Early spaying offers many health benefits, including reducing the risk of some cancers and infections, without causing emotional harm to your pet. Responsible spaying reduces unwanted litters and supports animal welfare.

5. You Can't Teach an Old Dog New Tricks

The fact: Dogs can learn at any age, though training approaches may differ.

While puppies may learn quicker, older dogs remain capable of acquiring new skills and adapting behaviours. Many rescue dogs are successfully re-trained and find loving homes. When training seniors, consider their sensory or cognitive changes—adjust pace and methods accordingly. Patience and tailored techniques help maintain your dog's mental agility and strengthen your bond.

Understanding these common myths supports responsible dog ownership and strengthens your relationship with your furry friend. By recognising the facts, you can provide better health and happiness for your canine companion.

Whether you're finding a puppy or caring for an older dog, knowing the truth behind these myths empowers you to make informed choices and continue learning throughout your pet's life.