Time to bust myths about small dogs

Small dogs (Chihuahuas, Dachshunds, Miniature Pinschers, and other companions weighing under 10 kg) often suffer from stubborn reputation. Frequently labeled as "snappy" or aggressive, they are subject to broad generalisations that mask a far more complex reality. Behind these common stereotypes lie biased interpretations or unjustified assumptions. Fortunately, the science of animal behaviour provides clear insights to separate fact from myth. Marion, the lead behaviourist within the Pet Cheri network, explains it all.

🙅🏻‍♀️ Size ≠ Innate temperament

A common belief suggests that small dogs are naturally more aggressive than larger ones. However, scientific research shows that:

• A dog’s breed or size alone cannot predict its aggressiveness or temperament : The French National Agency for Food, Environmental and Occupational Health & Safety (ANSES) states this clearly in a report on bite risks: “Breed alone is not sufficient to predict or prevent the risk of biting,” and there is no evidence that a dog bites more simply because it belongs to a specific breed.

• Some large breeds, despite their imposing build, may display less aggressive behaviour than poorly socialised small dogs. Stereotypes suggesting that a pitbull is inherently more aggressive than a bichon are therefore unfounded generalisations.

📊 What studies say about small dogs

Several studies have explored the links between size, behaviour, and aggression :

• Epidemiological research shows that, in certain populations studied, small dogs displayed a higher frequency of reactive or aggressive behaviours (such as barking, growling, or attempted biting). This has been observed in large-scale surveys comparing multiple breeds.

• Scientific analyses have also identified a statistical link between smaller body size and certain behavioural expressions considered problematic, such as heightened reactivity or nervousness as perceived by owners. These behaviours appear more frequently in smaller dogs in some studies, but this does not mean that they are “naturally aggressive” in all situations.
  
  It is important to note that behaviours such as growling or barking are not automatically indicators of malicious aggression. They may instead reflect fear, anxiety, or a response to a stressful stimulus.

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🐾 The major role of the environment

Canine behavioural science highlights one essential factor: environment and education.

Early socialisation, consistent training, appropriate exercise, and mental enrichment play a key role in the behavioural development of all dogs; small or large. A recent study published in Scientific Reports highlights that experiences during the first months of life can have an impact on aggression and fear levels that is just as strong as biological factors.

Dogs that have not been exposed to enough positive stimuli, that live in anxiety-inducing environments, or whose undesirable behaviours have never been addressed appropriately are more likely to develop heightened reactivity.

Learned behaviour, not a fatality

Behavioural science distinguishes between two major influences:

• Nature (genetics, physical constitution)
• Nurture (education, experience)

In dogs, the interaction between these two factors is complex. Genetics may predispose some individuals to greater sensitivity or reactivity, but aggressive behaviours are not deterministic. Proper socialisation and suitable training can prevent most undesirable behaviours.

Aggressive behaviour is a form of communication, often linked to fear or frustration, not a “desire to cause harm.” It serves to create distance. Learning to read a dog’s body language and recognise signs of discomfort is therefore fundamental.
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Final word : towards a nuanced understanding

Misconceptions about small dogs and aggression persist because they oversimplify a complex reality. Canine behaviour is not determined by size alone; it results from a subtle combination of genetics, environment, education, and individual experiences.

Rather than thinking in terms of size or breed, it is scientifically more relevant to view each dog as a unique individual, to whom the same principles of learning, respect, and socialisation apply as to any other animal.
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🧡 To go further with a respectful, animal-centred approach, Pet Cheri relies on a network of experts specialising in positive education. These certified professionals support you in decoding your companion’s signals and strengthening your bond, far from power struggles and size-related prejudices.

For personalised advice, contact us at +33 6 16 65 26 01 or by email at concierge@petcheri.com.Our behavioural concierges and veterinary assistants (ASVs) will be happy to guide you 🫶

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