Understanding the Link Between Pain and Behavioural Change in Dogs

What if the behaviour you are noticing is not primarily a training issue, but a subtle sign that something does not feel quite right?

Dogs experiencing discomfort do not always show obvious physical signs such as limping or vocalising. In many cases, the earliest indicators appear as changes in behaviour. These changes can be gradual, easily misunderstood, and sometimes dismissed, yet they may represent an important form of communication.

Clinical and behavioural research increasingly recognises that pain can influence behaviour in dogs, including fear-related responses, reduced tolerance to handling, and changes in social interaction.

Understanding this connection helps ensure that behavioural changes are considered within the wider context of physical wellbeing, alongside training, environment, and emotional factors.

How Pain Can Influence Behaviour

Dogs are highly adaptable animals and may continue to function despite discomfort. Rather than showing clear physical signs, some dogs may express discomfort through changes in behaviour, mood, or activity levels.

These behavioural shifts are sometimes interpreted as anxiety, stubbornness, or reactivity, when discomfort may be one of several contributing factors.

Behavioural changes that may be associated with pain or physical discomfort include:

• Increased anxiety or restlessness

• Reduced tolerance of handling or grooming

• Withdrawal from interaction

• Reluctance to perform previously enjoyed activities

• Changes in play behaviour or social engagement

• Reactivity towards people or other dogs

• Altered sleep patterns or appetite

Research exploring aggression in dogs presenting to behaviour clinics found that pain or musculoskeletal discomfort was identified in a substantial proportion of cases, highlighting the importance of including medical assessment when behavioural concerns arise (Mills et al., 2020).

Veterinary behavioural studies also describe how pain can contribute to fear-related responses and defensive behaviour, particularly when the dog anticipates discomfort during handling or movement.

Why Subtle Pain Is Often Missed

Identifying discomfort in dogs can be challenging, particularly when behavioural changes are the primary sign.

Dogs may mask pain as part of natural survival behaviour, and subtle indicators such as posture changes, altered gait, or reduced movement can be difficult to recognise without careful observation.

Clinical environments can also influence behaviour. Veterinary research has shown that stress associated with unfamiliar environments can alter behavioural responses and pain expression, making interpretation more complex during short examinations.

In these situations, allowing dogs time to settle and observing them in a calm environment can provide valuable additional information.

Watching how a dog:

• moves around the room

• sits and stands

• shifts weight

• responds to gentle interaction

may reveal patterns that are less visible during a brief or stressful assessment.

The Importance of a Low-Stress Environment

A calm, dog-centred environment can support both animal welfare and accurate clinical observation.

When dogs feel safe enough to relax, their natural movement patterns and behavioural responses are more likely to emerge. This can help clinicians identify subtle signs of compensation, hesitation, or discomfort.

Low-stress handling approaches are widely recommended in veterinary practice because stress can influence both behaviour and pain expression, potentially masking or exaggerating clinical signs.

Providing time, space, and familiar support during assessment may therefore improve both the dog’s experience and the quality of clinical observation.

Listening to Owners and Observing Over Time

Owners are often the first to notice small changes in their dog’s behaviour.

These changes may seem minor at first, but they can provide valuable early clues.

Examples may include:

• hesitation before jumping into the car

• reluctance to climb stairs

• avoiding certain surfaces

• reacting differently to touch or grooming

• reduced enthusiasm for walks or play

Research into chronic pain recognition in dogs highlights the importance of owner observations and ongoing monitoring, as subtle behavioural changes may appear before clear physical signs develop.

Combining owner insight with professional assessment over time allows patterns to emerge that may not be obvious during a single appointment.

How Addressing Comfort Can Influence Behaviour

When physical discomfort is identified and appropriately managed within a veterinary care plan, some dogs show noticeable changes in behaviour. In other cases, progress may occur more gradually as comfort, mobility, and confidence improve.

A multimodal rehabilitation approach may be used to support dogs experiencing discomfort or mobility challenges. This can involve combining different therapeutic strategies that address movement quality, muscle function, and overall comfort.

Veterinary literature increasingly recognises the value of multidisciplinary approaches to pain management, particularly in chronic musculoskeletal conditions where movement, behaviour, and emotional wellbeing can all be affected.

All rehabilitation plans should be developed in collaboration with the dog’s veterinary surgeon, ensuring that treatment decisions are guided by clinical assessment and the dog’s individual needs.

Looking Beyond Labels

Behaviour is a form of communication.

When dogs change how they move, interact, or respond to their environment, there is usually a reason. Viewing behavioural change as a potential clue rather than simply a problem to suppress encourages a more thoughtful and compassionate approach.

By combining careful observation, low-stress handling, evidence-informed assessment, and collaboration with veterinary teams, it becomes possible to identify factors that may otherwise remain hidden.

At The Renew Centre, this whole-dog perspective supports informed clinical decision-making and helps guide appropriate care for dogs whose needs may be complex, but always deserve understanding.

References (Veterinary Research)

• Mills, D. et al. (2020). Pain and problem behaviour in dogs and cats. Journal of Veterinary Behaviour.

• Mills, D., Demontigny-Bédard, I., et al. (2020). Pain and behavioural problems in dogs: prevalence and clinical implications.

• Gruen, M.E., et al. (2014). The use of pain scoring systems in canine patients.

• Reid, J. et al. (2018). Chronic pain assessment in dogs: owner-reported behaviour changes.

• Mills, D. (2017). Medical causes of behavioural problems in dogs.