Smaller, older and male dogs are more likely to be aggressive and growl, click and bark at people, a study found.
Some breeds are also more likely than others to behave aggressively, and long-haired cars, such as the Lassi, are the most aggressive of all breeds.
In contrast, Labradors and Golden Retrievers, loved for their obedient temperament and gentle nature, have been discovered by scientists for the least aggressive breeds.
When comparing rough cars (left) with Labradors (right), researchers found that the former was 5.44 times more likely to be aggressive.
Which dog breeds are the most aggressive?
The list below was compiled by researchers from Helsinki who studied the behavior of more than 9,000 other dogs.
However, it includes only 23 breeds and is not exhaustive.
For example, notable breeds such as Rottweilers, Dobermans and British Bulldogs are not included.
- Rough cars
- A miniature poodle
- Miniature schnauzer
- German shepherd
- Spanish Water Dog
- The lagoon
- Chinese crest
- German Spitz means
- Cotton tulear
- Wheat terrier
- Pembroke Welsh Corgi
- Kern Terrier
- Border cars
- Finnish lapfund
- Smooth Collie
- Jack Russell Terrier
- Staffordshire Bull Terrier
- Shetland Sheepdog
- Lapland Herder
- Golden retriever
- Labrador Retriever
A study of more than 9,000 pets spanning 24 breeds was conducted by researchers at the University of Helsinki.
He revealed aspects of a dog’s personality that affect its likelihood of behaving aggressively toward people.
It has been found that small dogs are more likely to behave aggressively than medium and large dogs, but due to their size they are often not considered threatening and therefore bad behavior remains unaddressed.
The study, published in Scientific Reports, also found that male dogs were more aggressive than females and their neutering had no effect.
How experienced a dog owner has been also affects the chance of aggressive behavior by a pet, researchers found, as the first dogs of novice pet owners were more likely to behave aggressively.
The study also showed that dogs who spent time in the company of other canine dogs behaved less aggressively than those who lived without other dogs in the household.
But the dog breed is the factor that influences aggressive behavior more than any other variable except the elderly.
“In our data set, long-haired cars, poodles (toys, miniature and medium) and miniature schnauzers were the most aggressive breeds,” said Professor Hannes Lohi of the University of Helsinki.
“Previous studies have shown fear in long-haired cars, while the other two breeds have been found to express aggressive behavior towards strangers.
“As expected, the popular Labrador Retriever and Golden Retriever breeds were at the other extreme.
“People who are considering getting a dog need to know the origins and needs of the breed.
“As far as farmers are concerned, they must also pay attention to the nature of the dam applicants, as fear and aggressive behavior are inherited.”
Miniature Poodles (left) and Golden Retrievers (right) were considered the second most aggressive and second least aggressive breeds, respectively.
Lappish Shepherd Dogs (right) are the third least likely to be aggressive, but the Miniature Schnauzers (left) are the third most aggressive. Schnauzers are 3.34 times more likely to be aggressive than those of the Lappish shepherd
Comparing rough cars with Labradors, the smallest and most aggressive breeds, the researchers found that the former was 5.44 times more likely to be aggressive.
“In normal family dogs, aggressive behavior is often undesirable, while some service dogs are expected to have the ability to be aggressive,” said Sala Mikola, a doctoral researcher at the University of Helsinki.
“At the same time, aggression can be caused by well-being problems, such as chronic pain.
Fear of dogs has a strong connection with aggressive behavior, as cowardly dogs are many times more likely to behave aggressively.
“In addition, older dogs are more likely to behave aggressively than younger ones.
“One of the potential reasons for this could be the pain caused by an illness.
“Sensory disturbances can make it harder to spot people approaching, and dogs’ reactions in sudden situations can be aggressive.”
How old is your dog really in “human years”?
The oft-stated claim that a dog’s year is equivalent to seven human years is false, according to a dog expert.
Instead, the equation is more nuanced and depends on the dog’s cognitive and behavioral traits over time, as well as his breed.
A new study reveals that a dog becomes a teenager at just six months old, is a full-fledged adult at two years old and is an “adult” at about seven.
A review of previous studies looking at the effects of dog age on pet health has been published in the journal Frontiers in Veterinary Science.
Dr. Naomi Harvey, head of research at the Dogs Trust and an academician at the University of Nottingham, conducted the review.
She says that just because dogs live seven times shorter than humans does not mean that every trip around the sun costs seven for a dog.
“Dogs mature faster than we do,” says Dr. Harvey.
“Many one-year-old dogs have reached their full height and most will have passed through puberty or are nearing the end of it, so they are definitely not the equivalent of a seven-year-old!”
Instead of using the simplified factor of seven equations, Dr. Harvey tried to determine when a dog was a puppy, a minor, an adult, an adult, and a geriatric.
Her findings show that a one-year-old dog is a minor who is just reaching puberty and is similar to a 15-year-old.
But just 12 months later, two years later, the dogs have reached full maturity in the same way as a 25-year-old.
Dr. Harvey found that dogs can enter the elderly at the age of seven and are considered geriatric at the age of 12 and older.
Pictured is how different indicators change a dog’s behavior over time. Green shows how the brain develops and then begins to shrink in recent years; orange shows how some traits, such as cognitive decline, increase exponentially during a dog’s geriatric years; red indicates a slow decline in the dog’s activity and attention