Understanding Anxiety in Dogs and Cats: Causes, Signals, and Approaches

What Causes Anxiety in Dogs and Cats?

Anxiety in pets rarely has a single cause. Veterinarians and animal behaviourists recognise several categories of triggers that commonly contribute to anxious states in both dogs and cats.

Separation is among the most frequently reported causes in dogs. When a dog has formed a strong attachment to a person and cannot tolerate their absence, the resulting distress — called separation anxiety — can be intense and destructive. Cats can also experience separation-related distress, though it is less commonly recognised.

Environmental triggers include loud noises (thunderstorms, fireworks, construction), unfamiliar spaces, car travel, and veterinary visits. These can provoke acute fear responses or, with repeated exposure, a more generalised anxious state.

Social and household change is another key driver. The arrival of a new pet, a new family member, or a change in routine can unsettle animals significantly. If you've recently added a second pet, guidance on multi-pet introductions may help.

Medical conditions can also underlie or worsen anxiety. Pain, hormonal imbalances, neurological changes, and cognitive decline in older animals are all associated with increased anxiety. This is why a veterinary examination is an essential first step — what looks like anxiety may partly reflect physical discomfort. Our overview of signs your pet may be in pain covers what to watch for.

Genetics and early experience also play a role. Animals with limited socialisation during critical developmental windows, or those with a genetic predisposition to fearfulness, tend to be more vulnerable to anxiety throughout life.

Recognising Anxiety: What Dogs and Cats Signal

Both dogs and cats are capable of masking distress, which means anxiety can go unnoticed until it becomes severe. Understanding species-specific signals is essential for early recognition.

In Dogs

• Destructive behaviour when left alone (chewing, scratching at doors)
• Excessive vocalisation — barking, whining, or howling in response to triggers
• Pacing, restlessness, or inability to settle
• Panting or yawning in calm environments (not due to heat or exertion)
• Trembling, tucked tail, flattened ears
• House soiling in a previously toilet-trained dog
• Hypervigilance — scanning the environment constantly

In Cats

• Hiding more than usual or for extended periods
• Over-grooming to the point of hair loss, or conversely, neglecting grooming entirely
• Inappropriate elimination outside the litter box
• Reduced appetite or changes in eating patterns
• Increased vocalisation or sudden aggression
• Tension in posture — crouched low, dilated pupils, tail tucked or flicking

Because some of these signs overlap with signs of illness, it's worth reviewing what general unwellness looks like in pets — our guide to recognising when pets may be unwell offers a useful baseline. For deeper insight into behavioural signals, the Training & Behavior hub covers a wide range of topics.

“Anxiety in animals is not a behaviour problem to be punished — it is an emotional state that requires understanding, appropriate management, and often professional support. The earlier we intervene, the better the outcomes tend to be.”

— Dr. Karen Overall, Veterinary behaviourist and researcher in clinical animal behaviour

Management Approaches: What Actually Helps

Anxiety management in pets is not one-size-fits-all. Effective approaches are tailored to the individual animal, the severity of anxiety, and its specific triggers. Most plans involve a combination of the following.

Environmental and Lifestyle Adjustments

Providing safe spaces — such as a covered crate for a dog or a high perch for a cat — gives anxious animals a place to retreat. Predictable routines help reduce uncertainty. Reducing exposure to known triggers where practical (for example, keeping a noise-sensitive dog indoors during fireworks) is a reasonable short-term measure, though it should not replace longer-term behaviour work.

Behaviour Modification

Desensitisation (gradual, controlled exposure to triggers at low intensity) and counter-conditioning (pairing the trigger with something the pet enjoys) are evidence-based techniques used by veterinary behaviourists and certified trainers. These approaches take consistency and time, but they address the root of the anxiety rather than just suppressing visible symptoms. If you're unsure whether your pet's anxiety warrants professional help, see our article on when to involve a certified behaviourist.

Veterinary Treatment

For moderate to severe anxiety, a veterinarian may recommend medication to support behaviour work — not as a standalone solution. Several veterinary-approved options exist; your vet will discuss what is appropriate for your pet's species, size, and health status. Never adjust medication without veterinary guidance.

Products such as pheromone diffusers and calming supplements are widely used, though the evidence base varies. Discuss these with your vet before use to ensure they are appropriate and safe alongside any other treatment.

For further foundational guidance on responsible pet ownership, the Pet Ownership Basics hub is a helpful starting point.

This article is for general informational purposes only and does not constitute veterinary or medical advice. Always consult a qualified veterinarian for concerns about your pet's health or behaviour.