Most dog owners have been there. You come home to find the sofa chewed up, your dog refuses to come when called, or it growls over a food bowl for seemingly no reason. The natural instinct is frustration, followed by a conviction that the dog is just being stubborn. The reality, backed by a growing body of veterinary research, is often quite different.
Anxious behaviours are not the result of disobedience or spite. They are distress responses. A dog displays these behaviours because it is genuinely upset and trying to cope with a great deal of stress. Understanding that distinction changes everything about how you respond, and ultimately whether the behaviour improves or gets worse.
1. Destructive Chewing When Left Alone
Some dogs with separation anxiety chew on objects, door frames, or window sills, dig at doors and doorways, or destroy household objects when left alone. These behaviours can result in self-injury such as broken teeth, cut and scraped paws, and damaged nails. Crucially, if chewing and destruction are caused by separation anxiety, they typically do not occur in the owner’s presence. That last detail is the key diagnostic clue most owners miss.
A dog left alone for the first time might chew the door frame as a way to cope with separation anxiety. This behaviour is not about defiance but a response to emotional distress. Chewing can be a coping mechanism for dogs experiencing anxiety or stress, triggered by separation, loud noises like thunderstorms or fireworks, or changes in their environment such as moving to a new home. Punishing a dog for chewing after the fact does nothing to address the anxiety driving the behaviour.
2. Excessive Barking or Howling
A dog that has separation anxiety might bark or howl when left alone or when separated from its owner. This kind of barking or howling is persistent and does not seem to be triggered by anything except being left alone. To neighbours, it sounds like a difficult, badly trained dog. To a veterinary behaviourist, it is a clear signal of distress.
Veterinarians recommend seeking help if barking may be associated with sudden changes in behaviour or anxiety. If barking arises suddenly alongside other signs of distress such as panting, pacing, whining, and lip licking, the change may indicate a health or anxiety concern. Excessive barking due to separation anxiety occurs only when the dog’s caretaker is gone or when the dog is left alone, and you will usually see at least one other separation anxiety symptom such as pacing, destruction, elimination, or depression.
3. Refusing to Come When Called
Among the most common reported behaviour problems is disobedience, which includes behaviours such as jumping up at people and not coming when called. Owners typically interpret this as stubbornness or a failure to learn the command. In many cases, though, a dog that freezes, hides, or runs the other way when called is not ignoring the owner. It is overwhelmed.
With an anxiety disorder, situations that are not directly threatening to the dog are disproportionately perceived as dangerous. Sometimes even just the anticipation of a perceived threat triggers the anxious response. A dog that has previously been scolded for coming back, or that associates recall with something uncomfortable, may experience genuine fear around that cue. The refusal is self-protective, not defiant.
4. Resource Guarding Over Food or Toys
Resource guarding is a relatively common behaviour problem in dogs. It is defined as a dog using avoidance, threatening, or aggressive behaviours to retain control of food or other items in front of a person or other animal. Many owners take this personally, reading it as dominance or bad manners. The anxiety angle is often overlooked entirely.
Some dogs who are anxious and fearful may display resource guarding when they feel afraid or feel that other aspects of their environment are out of their control. Anxious dogs that are uncertain about their surroundings or that are not confident might resource guard. Using force and punishment in a situation like resource guarding often makes the behaviour problem worse, which is unfortunately a common first response. The growl is a warning born of insecurity, not arrogance.
5. House Soiling After Being Toilet Trained
One of the most common complaints of pet owners is that their dogs are disruptive or destructive when left alone. Their dogs might urinate, defecate, bark, howl, chew, dig, or try to escape. Although these problems can indicate that a dog needs to be taught better house manners, they can also be symptoms of distress. A fully toilet-trained adult dog suddenly eliminating indoors is not reverting to bad habits.
When a dog’s problems are accompanied by other distress behaviours, such as drooling and showing anxiety when its owner prepares to leave, they are not evidence that the dog is not house trained or does not know which toys are its own. Instead, they are indications that the dog has separation anxiety. The bladder and bowel loosening under acute stress is a physiological response, the same one humans experience under extreme fear. It is involuntary, not lazy.
6. Pulling Hard on the Leash
Undesirable behaviours such as excessive chewing, pulling on the leash, whining for attention, barking, and digging can be signs of social anxiety, panic, generalised anxiety, and separation distress. Leash pulling is almost universally labelled as a training problem, and while it sometimes is, anxiety-driven pulling has a distinctly different character. The dog is not excited. It is trying to escape a situation it finds threatening.
Behaviour problems rooted in fear, anxiety, excessive arousal, and impulsivity can develop as a result of genetic factors, stressful early environments, insufficient socialization, medical conditions affecting brain health and development, or traumatic environmental events. A dog that lunges or pulls constantly outdoors may be in a chronic state of hyperarousal, scanning the environment for threats rather than simply exploring. Jerking the leash in response adds pressure to an already overwhelmed nervous system.
7. Aggression Toward Strangers or Other Dogs
An anxious dog may pant, pace, tremble, drool, withdraw from its owner, or hide. Alternatively, they may appear irritable or aggressive, barking or growling at someone. Aggression reads as a confidence problem to many owners, a dog that is “dominant” or “poorly socialised.” The more accurate framing, supported by research, is that aggression is frequently fear in disguise.
The largest risk ratios in canine anxiety studies were seen between hyperactivity and inattention, separation-related behaviour and compulsion, and between fear and aggression. Pain is an important risk factor for behaviour problems. A study of veterinary behaviourists’ cases found that between roughly a quarter and more than three quarters of patients demonstrated signs of pain. This means that before labelling a dog aggressive, a full veterinary examination is essential to rule out underlying physical causes contributing to anxiety-driven reactivity.
8. Compulsive, Repetitive Behaviours
Some canine behaviour problems have been suggested to be analogous, or possibly even homologous, to human anxiety disorders. For example, canine compulsive disorder resembles human OCD on both a phenotypic and neurochemical level. Spinning in circles, chasing tails relentlessly, or pacing the same route over and over look like quirky habits. They are not. They are compulsions that often emerge from chronic stress and unresolved anxiety.
Dogs may demonstrate displacement behaviours, which are normal behaviours that occur out of context when a dog is stressed. Although not actively life-threatening, anxiety disorders are increasingly common and often lead to concerning behaviours such as self-injury, destructiveness, and inappropriate urination and defecation. Repetitive behaviours that escalate in frequency or intensity deserve a veterinary assessment rather than simply being managed or ignored. They are the clearest signal a dog can send that something is genuinely wrong beneath the surface.
The pattern across all eight of these behaviours is the same: they are responses to internal distress, not calculated acts of defiance. Research from Texas A&M College of Veterinary Medicine found that more than 99% of dogs show behaviours that are potentially problematic, with the top categories being aggression, separation and attachment behaviours, and fear and anxiety behaviours. The prevalence alone suggests that the vast majority of what owners experience as “bad behaviour” is actually a dog trying to communicate something it has no other language to express.
Owners appear to underestimate their dogs’ fearfulness, and the majority of people respond to their dogs’ anxiety behaviours with amusement rather than concern. Research supports that some owners are underestimating fearfulness in their dogs and responding inappropriately. Better education is required for dog owners to accurately interpret canine body language, both to safeguard dogs’ welfare and to minimise the development of anxiety-related behaviour problems. Recognising the difference between defiance and distress is not just a matter of fairness to the dog. It is the only starting point from which real progress becomes possible.
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