10 signs your dog is stressed — and what to do about it

Stress in dogs rarely announces itself dramatically. By the time your dog is reacting, barking uncontrollably or shutting down entirely, the stress has already been building for hours — sometimes days. The signals were there earlier. They were just easy to miss.

Research in canine ethology consistently shows that most owners misread or overlook early stress indicators in their dogs. This isn't a failure of observation — it's a failure of knowledge. Once you know what to look for, the signals become hard to unsee.

Why recognising stress early matters

Dogs communicate almost entirely through body language. Their stress signals exist on a spectrum — from very subtle calming signals that happen in low-level discomfort, right through to overt distress responses. The earlier you catch a signal on that spectrum, the more options you have to help your dog before their threshold is crossed.

Understanding trigger stacking is key here. Each stressor adds to a cumulative load on your dog's nervous system. A dog who yawns excessively on Monday morning, paces at lunchtime and won't settle at night isn't having three separate bad moments — they're building toward a threshold crossing that might not happen until Wednesday's walk.

Early stress signals are your dog's attempt to communicate. Learning to read them is one of the most important things you can do for your dog's long-term wellbeing.

The 10 signs to watch for

1. Yawning outside of tiredness

A yawn in an unstressful situation — during a greeting, when asked to do something, when exposed to something unfamiliar — is a well-documented calming signal in dogs. Research in applied animal behaviour science has shown that dogs use yawning as both a self-soothing behaviour and as a signal to others to calm down. A single yawn means little. Repeated yawning in a context that doesn't warrant tiredness is worth noting.

2. Lip licking and tongue flicking

A quick tongue flick — where the tongue briefly appears and disappears — is one of the most commonly overlooked stress signals. It's distinct from the slow lip lick a dog does after eating. In a stressful context, it happens fast and often. Watch for it during greetings with strangers, at the vet, or when your dog is asked to do something they find difficult.

3. Whale eye

Whale eye describes the expression when a dog turns their head slightly away but keeps their eyes on you — revealing the white of the eye (the sclera) in a crescent shape at the corner. It signals discomfort and is often a precursor to a snap or bite if the trigger isn't removed. It's most commonly seen when a dog is resource guarding or when a person leans over them.

4. Panting without physical exertion

Panting serves a thermoregulatory function, but it's also a reliable indicator of psychological stress. A dog panting in a cool room, after minimal exercise, or in a situation that has made them anxious is displaying a stress response. Studies in canine stress physiology show that elevated cortisol and adrenaline both trigger panting as part of the arousal response.

5. Hypervigilance and scanning behaviour

A stressed dog is a dog whose nervous system is scanning for threats. They'll be difficult to get attention from on walks, their head constantly moving, eyes darting. They may freeze briefly to assess something that a relaxed dog would walk past. This hypervigilance is exhausting for the dog and significantly raises the likelihood of a reactive episode.

6. Excessive shedding

Many owners are surprised to learn that dogs can shed significantly more during stressful periods. This is a physiological stress response — the same phenomenon occurs in humans as hair loss during chronic stress. If your dog leaves an unusual amount of fur at the vet, in the car, or in a new environment, stress is almost certainly a factor.

7. Digestive changes

The gut-brain axis is well established in mammals. Acute or chronic stress in dogs frequently manifests as loose stools, reduced appetite, or complete refusal to eat. If your dog regularly won't eat before walks or has loose stools on busy days, their digestive system may be signalling what their behaviour hasn't yet shown you.

8. Displacement behaviours

Displacement behaviours are actions that seem out of context — sniffing the ground when greeted by another dog, suddenly scratching when asked to perform a cue, shaking off (as if wet) after an interaction. These behaviours are neurologically linked to conflict and stress: the dog's brain is in a state of competing motivations, and the displacement behaviour is a kind of release valve.

9. Refusing food they would normally take eagerly

A dog's willingness to take food is a reliable proxy for their stress level. Training professionals use this as a practical gauge: if a dog who normally wolfs down treats suddenly won't take them in a particular context, they are likely over threshold. This is why food refusal in training situations is a useful signal — it tells you the environment is asking more of your dog than their nervous system can currently handle.

10. Difficulty settling at home

A dog who can't settle — who keeps getting up, changing spots, pacing, or seeking attention repeatedly — is often carrying a stress load from earlier in the day or the previous 24–48 hours. This is one of the most informative signals because it correlates strongly with what has happened in the days preceding it, not just that afternoon.

What to do when you notice stress signals

The most important response to an early stress signal is to reduce the demand on your dog's nervous system. This might mean creating more distance from a trigger, ending a training session, returning home from a walk early, or simply giving your dog quiet space to decompress.

The second most important response is to start recording what you're seeing. A single stress signal in isolation is low-information. The same signal appearing at the same time of day, after similar events, across multiple days — that's a pattern. And patterns are where the real answers are.

Canine Insights is built specifically to help you spot those patterns. When you log daily stress signals alongside sleep quality, activity and triggers, the app can surface connections that would be invisible to the naked eye — like the fact that your dog's unsettled evenings reliably follow mornings with on-lead dog encounters, or that their stress signals peak mid-week because of accumulated load from the weekend.

You can get a quick snapshot of your dog's current stress level right now with our free dog stress checker.

The goal isn't to eliminate all stress from your dog's life — some stress is normal and healthy. The goal is to understand their individual stress patterns well enough to intervene before the load becomes unmanageable.