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Compulsive, Stereotypic and Displacement Behaviours in Dogs and CAts

What is a displacement behaviour?

In some situations, an animal may be motivated to perform two or more behaviours that are in conflict with each other (e.g. approach-withdrawal, greeting but fear of being punished).  The inability to perform both of the strongly motivated behaviours can lead to conflict resulting in the performance of a displacement behaviour.  This is usually a normal behaviour shown at an inappropriate time, appearing out of context for the occasion.  Grooming, yawning, circling, and vocalisations may be performed in stressful situations as displacement behaviours.

By comparison, when an animal is interrupted or prevented from performing a highly motivated behaviour (e.g. territorial aggression, fear aggression), it may be directed toward another person or animal.  This is known as redirected behaviour.   

What is a stereotypy?

Stereotypes are repetitive, relatively unchanging behaviour patterns without obvious goal or function.  They are usually derived from normal behaviours.  Stereotypic behaviours may be performed as components of displacement behaviours or compulsive disorders (see below).  They can also be due to physiological changes such as might occur with a neurological disorder (circling, head bobbing).  Examples of behaviours which may become stereotyped include pacing and grooming.

What is a compulsive disorder?

When an animal is repeatedly placed in a state of conflict, displacement behaviours may begin to be manifested during any state of stress or arousal as a result of sensitisation of the neural pathways controlling the behaviour.  Eventually, the pet loses control over the initiation and termination of the behaviour and it may become compulsive.  The compulsive behaviour may then occur in situations where the pet is minimally aroused.  Compulsive behaviours are often derived from normal behaviour patterns but appear to be abnormal because they are excessive, exceedingly intense, or performed out of context.  Although some compulsive disorders are repetitive and may therefore be referred to as stereotypic (wool sucking, pacing, tail chasing), other compulsive disorders such as freezing or staring are not truly repetitive. 

Since certain behaviours are more common in certain breeds, there may be a genetic predisposition to compulsive behaviours.  For example, flank sucking (see below) is most commonly seen in Doberman Pinschers, spinning (see below) in Bull Terriers, and fly chasing in Miniature Schnauzers and King Charles Cavalier Spaniels.  In cats, wool sucking is observed more frequently in Oriental breeds.

Many compulsive behaviours arise spontaneously as a response to conflict or anxiety, but behaviours may become compulsive or stereotyped because they have been conditioned.  For example, the owner who gives the young pet attention when it playfully chases its tail may reinforce the performance of the behaviour.  Owners that offer food or a toy in an effort to disrupt the behaviour are also rewarding the very problem they wish to stop.  Other apparently compulsive disorders are in fact forms of epilepsy.

In each case it is essential to diagnose, rule out or treat any medical condition that might contribute to the problem.  Some compulsive disorders have a component of self-mutilation (e.g. acral lick dermatitis — see below, or  tail biting) that will require separate medical treatment.  If the problem persists after all medical problems are diagnosed, treated, or ruled out, then behavioural modification, environmental manipulation and drug therapy may also be indicated.

In dogs, compulsive behaviours include acral lick dermatitis, flank sucking, pacing, circling, incessant or rhythmic barking, fly snapping or chasing unseen objects, freezing and staring, polydypsia, sucking, licking, or chewing on objects (or owners), tonguing or licking the air and other forms of self mutilation.  In cats, excessive sucking and chewing, hunting and pouncing at unseen prey, running and chasing, paw shaking, freezing, excessive vocalisation, self-directed aggression such as tail chasing or foot chewing, over-grooming or barbering of hair and possibly feline hyperaesthesia (see below) may all be manifestations of conflict, and may become compulsive disorders in time.

How can compulsive disorders be treated?

Since some stereotypic or compulsive behaviours are initiated by underlying medical problems, a complete medical work-up is always the first step.  Behaviours must be evaluated individually since not all require treatment.  In fact, treatment may only be necessary if the behaviour poses health risks to the animal or seriously worries the owner.  For some owners, the compulsive behaviour may be seen as an acceptable behaviour which helps to reduce stress in their pet.  For example, if flank sucking causes no physical harm, but occupies and calms the dog, then the compulsive behaviour may be preferable to the use of calming drugs, or the development of other disorders (acral lick dermatitis, destructiveness, excessive vocalisation).

Reducing stress or finding methods of decreasing the sources of arousal and conflict are the first aspect of treatment that should be explored.  Inconsistent training may lead to problems in the relationship between pet and owner.  The environment should be closely examined to ensure that the pet has sufficient stimulation, particularly when the owners are absent or otherwise occupied.  This should include sufficient exercise, play, and social attention, as well as appropriate toys.  Obedience training may be helpful and the owner should be cautioned that inappropriate punishment could actually intensify the problem rather than correct it.

Behavioural modification is most appropriate when owners can identify and predict those situations and times when compulsive behaviours are likely to arise.  They can then initiate an alternative activity (before the compulsive behaviour is overt) that is incompatible with the problem behaviour, such as play, training, feeding, or providing a chew toy.  Owners that have been rewarding the problem must remove all attention or rewards.  When the behaviour is exhibited in the owner’s presence, attention can be withdrawn by turning or walking away, or some form of remote indirect punishment not associated with the owner could be used e.g. ultrasonic or audible alarms or pebble cans. Such devices may also allow the owner to successfully interrupt the behaviour so that normal alternative behaviours can be re-established. 

Denying the pet access to the focus of its behaviour has mixed results.  For example, a bandage or an Elizabethan collar may allow acral lick dermatitis or feline psychogenic alopecia to heal, but once the collar is removed, most cases relapse.  In many cases, restricting access will worsen the problem by increasing anxiety or arousal.  Instead, the underlying cause of the anxiety or conflict should be identified, removed or the animal desensitised to the stimulus.

Drug therapy may be extremely useful for some pets with these problems just as it is in humans with obsessive-compulsive disorders.  Since lowered serotonin and increased dopamine levels in the brain may be associated with some compulsive disorders, drugs that help bring about a normalisation of one or both of these neurotransmitters (e.g. clomipramine, fluoxetine) may be effective in the treatment of these disorders.  A short course of therapy with anti-anxiety drugs may also be useful when the pet must be exposed to a potentially stressful or anxiety producing situation (new home, dramatic change in schedule, new baby).  Antihistamines may also be used to decrease anxiety and reduce the pruritus associated with some forms of self-mutilation.

Recently a new product has been launched which is a synthetic analogue of a scent signal used by dogs and is applied to the environment through a diffuser device.  This signal is believed to help in treating anxiety in dogs and one possible application may be in the treatment of compulsive disorders.  However this product, which is called (dog appeasing pheromone) D.A.P. would not be sufficient treatment alone and would be used as an adjunct to behavioural and pharmacological therapy.

What is canine acral lick dermatitis?

Acral lick dermatitis is when dogs repeatedly lick at specific sites on one or more of their limbs, often causing significant damage.  Large breeds such as Doberman Pinschers, Great Danes, German Shepherds, Labrador Retrievers, Golden Retrievers and Irish Setters are most commonly affected.  Underlying medical abnormalities (e.g. arthritis, chip fractures, skin disorders) may initiate or contribute to the behavioural problem.  The psychological condition arises when the pet is repeatedly stressed or anxious, and this leads to excessive licking.  The area becomes raw and itchy which further stimulates the dog to lick and chew.

With acral lick dermatitis, treatment must be directed at both the behaviour disorder and the skin trauma.  Even with behaviour therapy, treatment of the skin condition is essential.  Medical therapy might consist of treatment with long term antibiotics, anti-inflammatory agents, and preventing access to the area until the lesion heals.  Behavioural management and drug therapy is much the same as for other compulsive disorders (see above). 

What is canine flank sucking? 

Flank sucking is when the dog takes a section of flank skin into its mouth and holds the position.  Since the Doberman Pinscher is most commonly affected, a hereditary component is likely.  If the sucking does not cause significant lesions and does not interfere with the apparent health or welfare of the pet, flank sucking may be acceptable.  When the behaviour does cause physical damage or becomes so compulsive as to contribute to other behaviour problems (decreased eating, aggressiveness towards owners when approached during sucking) then treatment is necessary.  Behaviour management and drug therapy is the same as for other compulsive disorders (see above). 

What is tail chasing or spinning in dogs? 

Compulsive tail chasing may be a displacement or compulsive disorder in some dogs, other causes include a form of epilepsy, physical discomfort and medical illness.  Some cases such as those seen in Bull and Staffordshire terriers may exhibit a more intense spinning or whirling behaviour.  Other concurrent behaviour problems such as aggression have been reported in “spinning” Bull Terriers.  In some cases, the problem may have started as an incidental or play behaviour that was conditioned (rewarded) by the owner.  Once underlying medical problems are treated and an epileptic disorder has been ruled out, behaviour and drug therapy is usually the same as for other compulsive disorders (see above).

What is feline psychogenic alopecia?

Alopecia or hair loss can result when cats over-groom and remove fur.  Over-grooming can take the form of excessive licking, or the pulling out of tufts of hair.  The diagnosis of psychogenic alopecia as a compulsive disorder is reserved for those cases in which no underlying medical problem is evident.  Most cats with alopecia have an underlying skin disorder such as fleas, flea bite hypersensitivity, inhalant allergies, food allergies, parasites, bacterial or mite infections or a dysfunction of the endocrine system.  A 6 - 8 week food trial may often be recommended before considering the diagnosis to be purely behavioural.  Cats normally are fastidious groomers and as much as 30 - 50% of their time awake is spent performing some type of grooming behaviour.  As with other compulsive disorders, feline psychogenic alopecia may begin as a result of anxiety or frustration, but might in time become compulsive.

Increasing environmental stimulation (cat activity centres, chew toys, food or catnip packed toys, kitty videos, increased interactive play) can help.  The owner should keep toys out of the cat’s reach until they are put out daily.  They should be rotated every 1 - 3 days to provide different play items.  When home the owner should provide periods of interactive play and perhaps even a short training session to keep the cat occupied and focused.  Attention should never be given to the cat when the undesired behaviour is exhibited. As soon as the undesirable behaviour ceases, the owner should immediately engage the cat in an alternative acceptable behaviour (e.g. play, chew toys).  The owner should also try to identify environmental or social changes that may be contributing to anxiety and the behaviour.

Drug treatment might include antihistamines, anti-anxiety drugs, or antidepressants.   The exact drug chosen will depend on the clinical impression of the veterinarian managing the case.

What is feline hyperaesthesia?

Feline hyperaesthesia is a poorly understood condition that has also been referred to as rippling skin syndrome, rolling skin syndrome, or twitchy skin syndrome.  It may not be a true compulsive disorder.  The normal response of many cats to having their back scratched can include rippling of the skin, an arched back and varying degrees of vocalisation.  In hyperaesthesia, the affected cat may have a more exaggerated response to touching, rubbing or scratching of the back.  This behaviour may then become a stereotyped disorder as the frequency increases, the response becomes more intense and the signs begin to appear with little or no apparent stimuli.  In addition to rolling skin, muscle spasms and vocalisation, the cat may have dilated pupils, and may seem to startle, hallucinate and dash away.  Some cats will defecate as they run away.  There may also be some grooming or biting at the flank, tail, or back displayed along with the above behaviours.

Behavioural management requires the identification and control of the types of handling that lead to the behaviour.  Avoiding or minimising these types of handling, or desensitising and counter-conditioning techniques, which allow the cat to learn to "tolerate" these stimuli, may be successful at reducing the cat’s level of arousal.  For some cats who appear to be having a seizure disorder, anti-epileptic therapy may be effective although these drugs may act by generally reducing the cat’s level of arousal.  Treatment with anti-anxiety drugs or anti-depressants,  may also occasionally be successful.