Stress in Dogs: Definition and Classification

What does stress mean in dogs?

Stress in dogs is a physiological and psychological response to demands that the animal perceives as a burden. At the neuroendocrine level, stress is a measurable activation of the hypothalamic-pituitary-adrenal axis, involving the release of cortisol and a parallel sympathetic activation with adrenaline and norepinephrine. From a behavioral biology perspective, stress manifests as a spectrum ranging from brief, performance-enhancing arousal to chronic overload.

From a technical standpoint, it is important to distinguish between eustress (positive, short-term stimulation followed by a recovery phase) and distress (negative, prolonged stress without sufficient recovery). Both rely on the same physiological mechanisms—the difference lies in duration, intensity, and context. Stress is not inherently bad. Chronic distress without the opportunity for recovery, on the other hand, has a measurable negative impact on health.

Background and Academic Context

Basic research on stress in dogs originated from the Dutch school led by Beerda. Beerda et al. (1998) established a behavioral inventory for stress detection that is still used today: panting, licking, yawning, body shaking, paw lifting, averting gaze, scratching, and tension. These signals are not unambiguous—they must be interpreted in context and in combination.

In a long-term study, Dreschel (2010) demonstrated that chronically anxious dogs have a significantly shorter life expectancy and are more prone to skin diseases. Stress is therefore not merely a behavioral issue, but a health issue. In a large-scale Finnish study, Salonen et al. (2020) examined the cortisol profiles of dogs and were able to demonstrate correlations between chronic stress, activity levels, and living environment.

Sundman et al. (2019) demonstrated that cortisol levels in owners and dogs correlate over the long term—a sign of emotional synchronization in the human-dog relationship. Stress in the owner can thus be measurably transmitted to the dog.

Vitomalia-Position

At Vitomalia, we view chronic stress as an underestimated risk factor for behavioral issues and health problems. We recommend taking early signs of stress seriously, reducing stressful situations, and ensuring sufficient periods of rest and recovery. Rest is not a luxury, but a prerequisite for adaptive behavior.

We reject: downplaying signs of stress by saying "he'll relax in a minute," training at the limit of a dog's endurance ("confrontation helps"), and the blanket assumption that a busy dog is a happy dog. Over-exertion is a common cause of chronic stress, especially in active breeds.

When does stress become a concern in dogs?

Stress becomes clinically significant when it becomes chronic or when a dog regularly experiences distress in a specific situation. Typical scenarios: separation anxiety, visits to the vet (see vet training), sensitivity to noise (New Year’s Eve, thunderstorms), reactivity on a Leash, new life situations (moving, new family members), illness accompanied by pain, and an improperly balanced activity level with too little rest.

Practical application

Recognizing signs of stress: panting without being hot, excessive licking of the lips, dilated pupils, shivering, body shaking after stressful situations, muscle tension.
Keep track of triggers: Keeping a stress journal for two weeks can help clarify things. What situations, how intense, and how long does it take to recover?
Reduce stress: Keep your distance from triggers and avoid them until the threshold has shifted.
Ensure plenty of sleep and rest: Adult dogs need 17–20 hours of rest per day. Puppies need even more.
Establishing a routine: Predictable structures have been shown to lower cortisol levels.
For chronic stress: Veterinary evaluation of pain, thyroid function, and digestive organs. Behavioral therapy support.

Common Mistakes and Myths

"My dog needs more exercise." This is often a misconception. Salonen et al. (2020) show that excessive activity without rest periods increases distress. More exercise isn't automatically better.
"Stress relief comes from letting off steam." High-energy play tends to increase arousal. Sniffing, chewing, and quiet activities are more effective.
"If he's panting, he's overheated." Not necessarily. Panting without overheating is a classic sign of stress, according to Beerda et al. (1998).
"Dogs recover on their own." That's true to a point. Acute stress hormones can linger for hours. Multiple stressful situations in a row lead to trigger stacking, even if each one seemed harmless on its own.
"Dogs never get depressed." Chronic distress can manifest as symptoms similar to depression: lack of energy, social withdrawal, inactivity. A veterinary examination is recommended.

State of the art in 2026

The evidence regarding stress in dogs has been consistent for two decades. Consensus: cortisol as a marker, behavioral observation as a practical indicator, and rest as a key factor. Sundman et al. (2019) expand the picture to include the social dimension—owner-dog stress synchronization. Open questions concern cortisol variability (saliva vs. hair vs. urine), individual stress resilience, and the effectiveness of pheromone products—the evidence here is limited and mixed.

Frequently Asked Questions

How can I tell if my dog is stressed?

Watch for increased licking, panting without heat, body shaking, tension, dilated pupils, and withdrawal. Multiple signals together are more meaningful than individual ones.

How long does it take for cortisol levels to drop again?

Acute: about 30–60 minutes; chronic: several days, depending on the level of stress. Multiple consecutive episodes of stress add up.

Does more exercise help reduce stress?

No, often the opposite. Calm activities like sniffing and chewing are more effective than high-energy play.

Does my stress affect my dog?

Yes, according to Sundman et al. (2019), long-term cortisol levels correlate between owners and dogs.

Related terms

Sources and further reading

Beerda, B., Schilder, M. B. H., van Hooff, J. A. R. A. M., de Vries, H. W., & Mol, J. A. (1998). Behavioural, saliva cortisol and heart rate responses to different types of stimuli in dogs. Applied Animal Behaviour Science, 58(3-4), 365-381.
Dreschel, N. A. (2010). The effects of fear and anxiety on health and lifespan in pet dogs. Applied Animal Behaviour Science, 125(3-4), 157-162.
Salonen, M., Sulkama, S., Mikkola, S., et al. (2020). Prevalence, comorbidity, and breed differences in canine anxiety in 13,700 Finnish pet dogs. Scientific Reports, 10, 2962.
Sundman, A.-S., Van Poucke, E., Holm, A.-C. S., et al. (2019). Long-term stress levels are synchronized in dogs and their owners. Scientific Reports, 9, 7391.
Hekman, J. P., Karas, A. Z., & Dreschel, N. A. (2012). Salivary cortisol concentrations and behavior in a population of healthy dogs hospitalized for elective procedures. Applied Animal Behaviour Science, 141(3-4), 149-157.