Study Confirms That Dogs From Bad Breeders Have Bad Personalities

New research finds that dogs who come from irresponsible breeders tend to be more aggressive, more fearful of other dogs, and more anxious than dogs coming from responsible breeders.

Animal scientists at Newcastle University presented the first UK study to examine how a puppy’s early developmental years at a breeding facility (i.e., a puppy farm) can affect their behaviors into adulthood.

The study assessed three popularly bred breeds — Pugs, Chihuahuas, and Jack Russell Terriers — and grouped them into two categories: those coming from responsible breeders and those coming from less responsible breeders.

Owners were asked questions such as:

  • “Did you see the mother?”
  • “Were health documents available?”
  • “Were the puppies brought up in a home environment?”
  • “Did you have any concerns for the bitch or puppies’ welfare?”
  • “At what age did you get the puppy?”

Owners were then asked to rank their dogs against certain key canine traits, and the Canine Behaviour and Research Questionnaire (C-BARQ) was used to assist.

Traits included the following:

  • Aggression toward strangers, owners, and other dogs
  • Fear of new things or loud noises
  • Whether they suffered from separation anxiety or other similar issues
  • Obedience and trainability

Overall, dogs from “puppy farms” — what we call backyard breeders in the United States — were found to have poorer personalities in adulthood.

According to research supervisor Dr. Catherine Douglas, a lecturer in animal science at Newcastle University, dogs from both large-scale and smaller-scale facilities were included in the study.

These facilities were considered “less responsible” based on the fact that the dogs’ welfare appears to not be of primary concern.

New Questions Arise

While some research has been conducted on the physical health of dogs from breeders, little research has been conducted on the long-term effects of dog breeding on canine behavior.

The researchers concluded that across all behavior categories, dogs from less responsible breeders were found to have less favorable temperament and behavior than those raised by responsible breeders.

These results are likely no big surprise to most dog owners and professionals, but until now, there has been little proof behind these suspicions.

Douglas hopes that this new evidence will encourage people to conduct more research on the source of their puppies and make better choices when adopting.

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Dogs From Bad Breeders Have Bad Personalities
Dr. Catherine Douglas with her labradoodle Mumford. Photo: Newcastle University

A Win For Animal Welfare

The questionnaire originated at Pennsylvania State University when Professor James Serpell conducted a similar study in the United States on dogs acquired from pet stores; these pet stores, by and large, acquire their puppies from backyard breeders.

This latest Newcastle study was conducted as part of ongoing research into the understanding of human-animal interactions; this includes the study of the behavior and welfare of companion animals.

It should be unsurprising that, just as in humans, dogs who have a rough start in life will have a more difficult time behaving properly.

Previous studies have shown that puppies who had stressed moms or moms who were fed poorly during pregnancy turned out to be more anxious and less trainable.

It should also come as no great shock that early separation from the mother has been found to have detrimental effects on personality development in dogs.

Douglas hopes that these sorts of studies raise public awareness of the negative impacts of irresponsible breeders and that people will be less inclined in the future to give money to individuals or groups seeking only monetary profit at the expense of animal welfare.

Dogs in puppy mills suffer immensely, often being confined in cages, subject to filthy conditions, and overbred time and time again.

These mills are an animal welfare worker’s worst nightmare.

Douglas stresses that a successful relationship with your dog starts with you, the owner, adopting from a responsible source.

She also urges people not to adopt a puppy just because they feel sorry for it — another will be bred in its place, and the problems will continue.

Please consider adopting only from reputable sources (or shelters!) and not giving your money to an irresponsible breeder, who will only give you a dog riddled with health and behavior issues.

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  • “Do puppies from ‘puppy farms’ [puppy mills] show more temperament and behavioural problems than if acquired from other sources? Using CBARQ to assess” Rebecca Gray, Catherine Douglas, Sophie Butler and James Serpell, Presented at British Society of Animal Science “Annual Conference”, Chester, UK, 6th April 2016.
SOURCENewcastle University
Cody has worked and volunteered with rescue animals her entire life. She worked as a veterinary assistant and technician in shelters, rescues, boarding facilities, doggy daycares and animal hospitals in New York and Chicago throughout her teens and twenties, and now resides as a pet foster mom in Upstate New York.