Boredom in Dogs: Does It Exist, and How Can It Be Measured?
Few explanations for dog behavior are used as often as boredom. A chewed shoe, a dog that follows its owner around the house or barks at nothing: the dog must be bored. Yet boredom…
unterHUNDs Research
Stress and emotion
Fear, frustration and chronic load shape behavior more than any training gap. These reviews trace what happens physiologically, how emotional states are measured, and where the common shortcuts – reading behavior as emotion – break down.
Looking for practical help with your own dog? Our guides for dog owners put this research into plain, everyday steps.
These articles are written in English and aimed at trainers, behavior consultants and veterinary professionals. Deutschsprachige Beiträge findest du im Hunderatgeber.
Facial Expressions in Dogs: Puppy Dog Eyes, DogFACS and What Faces Reveal
A raised inner brow, flattened ears, a relaxed open mouth: people read dog faces constantly, and the "puppy dog eyes" have become a famous story about how domestication shaped the…
Calming Signals in Dogs: What the Research Supports
Head turning, lip licking, yawning and sniffing the ground are widely taught as calming signals: behaviors a dog uses to calm another dog or a person and to prevent conflict. The i…
Play Signals in Dogs: How Dogs Communicate "This Is Play"
When two dogs play, they chase, pin, grab and bite, using movements that also belong to fighting and hunting. That play rarely turns into a fight is usually credited to play signal…
Anticipatory Behavior in Dogs: Excitement Before Rewards as a Welfare Signal
Most dogs know when a walk is coming before the leash is in anyone's hand, and many announce dinner long before the bowl is filled. Welfare science has taken that kind of excitemen…
Environmental Enrichment in Dogs: What It Is, What It Changes and How to Measure It
Puzzle feeders, snuffle mats and chew toys are sold as enrichment, and the word suggests that more is always better. The research is narrower than the marketing. Most controlled st…
Touch and Petting: How Dogs Respond to Being Handled
Most people touch dogs without thinking about it, and most assume the dog enjoys it. The research is more conditional. Petting can work as a reinforcer, and in several studies huma…
Psychopharmacology in Dogs: What the Trials Show and What They Do Not
Few topics in dog behavior are argued about with as much certainty and as little reference to data as psychoactive medication. One side treats it as chemical restraint that covers…
Trigger Stacking in Dogs: What Is Measured and What Is Assumed
A dog manages a lift, a delivery driver and a barking neighbor, then explodes at a dog across the road that it walked past yesterday without comment. The explanation offered almost…
Noise Sensitivity in Dogs: Prevalence, Pain and What the Evidence Supports
A dog presses itself into the gap behind the sofa on New Year's Eve, shaking, panting, unreachable. The owner sits nearby, blinds closed, radio on, and does the thing that seems ob…
Welfare Science and Quality of Life in Dogs
What the Five Domains Model covers, how well canine quality-of-life instruments are validated, why positive states resist measurement, and what changes a dog's welfare.
Cognitive Bias in Dogs: Measuring Optimism, Pessimism and Mood
A bowl sits halfway between two places a dog knows well. On the left, bowls have always contained food. On the right, they have always been empty. The dog has never seen a bowl in…
Music and Auditory Enrichment for Dogs: What the Evidence Supports
"Music calms dogs" compresses several different questions into one sentence. Sound can change behavior in some stressful environments, but that does not show that dogs experience m…
Fear Conditioning and Memory Reconsolidation in Dogs: From Neuroscience to Behavior Therapy
A dog treated successfully for its fear of the vacuum cleaner is calm around it for months — then panics again after a house move. Nothing was untrained. The fear had never been re…
Emotions in Dogs: What We Know and What We Do Not
What separates an emotion state from a conscious feeling, which frameworks the field uses, what can be measured, and where the claims outrun the data.
Pheromones, Supplements and L-Theanine for Dogs: What the Evidence Supports
What the appraisals found for pheromones, alpha-casozepine, tryptophan, L-theanine and CBD, and how to read a calming-product study before believing it.
Social Referencing and Social Buffering in Dogs
People change how dogs respond to difficult situations in two distinguishable ways. Dogs can look to a person for information about something uncertain and adjust their behavior ac…
Controllability and Predictability in Dogs: Two Variables, Often Confused
Predictability and controllability are often treated as if they were the same welfare variable. They are not. Predictability concerns whether an animal can anticipate what is about…
Approach–Avoidance Conflict in Dogs: Competing Motivations
A dog that wants to greet a visitor but crouches with its tail tucked. A dog that starts toward a novel object and stops mid-step. A dog lunging at the end of a lead toward another…
Canine Body Language: What the Evidence Actually Shows
Canine body language is usually taught as a vocabulary: a lowered tail means fear, a yawn means stress, a play bow means an invitation, a lip lick means an attempt to calm. The res…
Behavior Does Not Equal Emotion: Limits of Inferring Internal States from Observable Actions
A dog wags its tail. Happy? A dog lies still on its bed. Relaxed? A dog stops barking after a correction. Calm now? These readings feel automatic, and they rest on an assumption th…
Measuring Stress in Dogs: Cortisol, HRV, Behavior and Their Limits
Almost every applied study of dog welfare eventually makes a claim that a dog was more or less stressed. Cortisol, heart rate, heart-rate variability and behavior are common eviden…
Arousal Regulation in Dogs: Self-Control, Learning and Calm
A dog that performs a flawless recall in the garden cannot hear its name fifty meters from another dog. A dog that takes food gently at home will not touch a sausage at the vet. Ne…
The Neurobiology of Frustration in Dogs: Violated Expectations, Measurement and Evidence
Frustration is something nearly every dog owner has watched unfold: the paw slapping the food bowl during a delayed meal, the desperate barking when a longed-for playmate is just o…
The Neurobiology of Anxiety in Dogs: From the Amygdala to Behavioral Disorder
Anxiety is one of the most common behavioral problem areas in dogs. Noise sensitivity and fearfulness affect a large share of pet dogs, and anxiety-related problems often bring imp…
Emotional Contagion in Dogs: Can Human Stress Influence Canine Stress Responses?
Dogs are extraordinary readers of human emotion. Thousands of years of living alongside us have tuned them to our gestures, faces, voices, and moods, and a large literature confirm…
The Neurobiology of Separation Anxiety in Dogs: Beyond “Spite” to Survival
Separation-related problems are among the most common reasons dogs are brought to behavior professionals, and among the most misread. A dog that howls, shreds the doorframe, or soi…
Chronic Stress in Dogs: Neurobiology, Cortisol and Long-Term Behavioral Impact
You punish the growl, and tomorrow it comes back louder. You comfort the trembling, and the fear does not fade. You have tried training, corrections, maybe a different trainer, and…
For dog owners: the unterHUNDs guides cover behavior, training, health and everyday life in practical terms, with the same sources behind them.