Rare type of Aggression in Dogs

Few things worry dog owners more than aggressive behaviour.

Whether it’s growling over food, barking at strangers, lunging on walks, or reacting suddenly around other dogs, aggression can feel frightening, upsetting, and overwhelming. Many owners immediately fear they have a “bad” or “dangerous” dog.

But aggression itself is not automatically abnormal.

In fact, aggression is a completely natural form of canine communication (Handelman, 2012). The important thing is understanding the difference between normal aggression and maladaptive aggression — because they are not the same thing.

Aggression Is Communication

Dogs cannot verbally say:

• “I’m uncomfortable.”

• “Please stop.”

• “I need space.”

• “I’m scared.”

Instead, they communicate through body language and behaviour.

Growling, barking, snapping, stiffening, or lunging are often part of a dog’s warning system. These behaviours exist for an important reason: to prevent conflict from escalating further.

Normal aggression is actually designed to avoid injury.

What Does Normal Aggression Look Like?

Normal aggression is appropriate to the situation and serves a clear purpose.

For example:

• A dog growls when another dog is pushing into their space

• A mother dog warns someone away from her puppies

• A dog snaps when cornered or frightened

• A dog guards a valued resource like food or a toy

These behaviours are natural survival responses and part of normal canine social communication (Overall, 2006).

Importantly, dogs using normal aggression usually give multiple warning signs before escalating.

Behaviourist Kendal Shepherd’s “ladder of aggression” describes how dogs often start with subtle signals such as:

• Lip licking

• Turning away

• Whale eye

• Freezing

• Tension

• Growling

Only if those signals are ignored may the dog escalate further.

A well-socialised, emotionally healthy dog generally uses aggression appropriately and stops once the threat or discomfort is removed.

So When Does Aggression Become Maladaptive?

Maladaptive aggression is very different.

This type of aggression is excessive, inappropriate, intense, or disconnected from the actual situation (Connor et al., 2019).

Rather than functioning as healthy communication, the behaviour becomes harmful to the dog and those around them.

Dogs displaying maladaptive aggression may:

• React explosively with little warning

• Escalate rapidly

• Remain highly aroused long after the situation ends

• Appear constantly “looking for conflict”

• Display intense hard staring or highly tense body language

• Struggle to disengage socially

Unlike normal fear responses, which often include conflicting or avoidant body language, maladaptive aggression can appear unusually confident, intense, or impulsive (Overall, 2006).

At its core, maladaptive aggression is often rooted in chronic fear, stress, anxiety, frustration, or emotional dysregulation (Landsberg & Denenberg, 2014).

Why Understanding the Difference Matters

Understanding whether aggression is normal or maladaptive changes how we approach training.

Too often, owners punish growling or warning signals because they find them worrying or embarrassing.

But punishing normal communication can actually remove the warning system while leaving the underlying emotion unchanged.

A dog that learns growling is “not allowed” may eventually skip warnings altogether.

How Training Helps Normal Aggression

Normal aggression can often be managed and improved through:

• Clear structure and routines

• Positive reinforcement training

• Proper socialisation

• Environmental management

• Meeting the dog’s physical and emotional needs

For example, in multi-dog households, simple management strategies

such as:

• Separate feeding areas

• Baby gates

• Individual rest spaces

• Structured routines

can dramatically reduce conflict (Overall, 2006).

Training also helps owners identify early signs of discomfort before situations escalate.

A dog who suddenly cannot perform familiar cues like “sit” or “wait” may be telling us they are emotionally overwhelmed and need support or distance.

Why Maladaptive Aggression Needs Professional Support

Maladaptive aggression is much more complex and often requires professional intervention.

Behaviour modification plans may involve:

• Desensitisation

• Counterconditioning

• Stress reduction

• Predictable routines

• Veterinary assessments

• Behavioural medication in some cases

For example, pairing previously stressful triggers — such as other dogs or unfamiliar people — with positive experiences can gradually change emotional responses over time (Landsberg et al., 2023).

Importantly, punishment-based methods have been shown to risk worsening fear, stress, and aggression (Williams & Blackwell, 2019).

Dogs learn best when they feel safe.

Aggression Does Not Mean Failure

One of the most important things owners need to hear is this:

Aggression does not automatically mean you have failed your dog.

Many aggressive behaviours are rooted in emotion, fear, stress, pain, genetics, or unmet needs — not stubbornness or dominance.

And many dogs make enormous progress with the right guidance and support.

The Bigger Picture

Normal aggression is part of healthy canine communication. Maladaptive aggression is a sign something deeper is wrong emotionally, medically, or behaviourally.

The key is not simply stopping the behaviour.T

he key is understanding why it is happening.

When owners learn to recognise early warning signs, support their dog emotionally, and seek help early, dogs are far more likely to feel safe, understood, and successful in the world around them.

And that understanding can transform both the dog’s life and the relationship they share with their family.

References

Connor, D.F., Newcorn, J.H., Saylor, K.E., Amann, B.H., Scahill, L., Robb, A.S., Jensen, P.S., Vitiello, B., Findling, R.L. and Buitelaar, J.K., 2019. Maladaptive aggression: with a focus on impulsive aggression in children and adolescents. Journal of child and adolescent psychopharmacology, 29(8), pp.576-591.

Handelman, B., 2012. Canine behavior: a photo illustrated handbook. Dogwise Publishing.

Landsberg, G. and Denenberg, S., 2014. Behavioral Problems of Dogs. Available at: https://www.msdvetmanual.com/behavior/normal-social-behavior-and-behavioral-problems-of-domestic-animals/behavioral-problems-of-dogs (Accessed: 18/09/2024).

Landsberg, G., Radosta, L. and Ackerman, L. eds., 2023. Behavior Problems of the Dog and Cat: Behavior Problems of the Dog and Cat-E-Book. Elsevier Health Sciences.

Overall, K.L., 2006. Overview of canine aggression. Available at: https://www.cabidigitallibrary.org/doi/pdf/10.5555/20103115193 (Accessed: 18/09/2024).

Williams, E.J. and Blackwell, E., 2019. Managing the risk of aggressive dog behavior: investigating the influence of owner threat and efficacy perceptions. Risk Analysis, 39(11), pp.2528-2542.