CAT BEHAVIOUR VET
Why cats bite, scratch or attack people
Cats may sometimes bite, scratch, swat, lunge, or display other behaviours towards people which can be frightening, confusing, and in some cases dangerous. These behaviours are often described as aggression, but this term simply describes what the cat is doing rather than explaining why the behaviour is happening.
Cats do not bite or attack people without reason. In order to resolve the problem successfully, we first need to understand what is triggering the behaviour and why the cat is responding in this way. In many cases, behaviours such as biting or scratching reflect fear, pain, frustration, anxiety, learned behaviour, or an underlying medical problem.
Fear or defensive behaviour
One of the most common reasons cats bite or scratch people is because they feel threatened.
This may occur when a cat is:
• Restrained or handled in a way they find frightening
• Approached when cornered or unable to escape
• Forced into unwanted interaction such as being picked up or stroked for too long
• Feeling fearful around unfamiliar people
• Experiencing repeated interactions where warning signs are ignored
Cats show subtle warning signals before biting or scratching people, including freezing, flattened ears, tail flicking, turning the head away, skin twitching, hissing, growling, or attempting to move away. In many cases, bites and scratches occur because these early warning signs have not been recognised. The cat feels that it is not in control of the situation and acts to regain this control.
Pain or underlying medical disease
Pain and disease can significantly affect a cat’s behaviour and reduce their normal tolerance for interaction. A cat who begins biting, scratching, or reacting negatively to handling should always be assessed by a veterinary surgeon.
Medical causes may include:
• Arthritis or chronic pain
• Dental pain
• Hyperthyroidism
• Neurological disease
• Skin disease causing discomfort
• Cognitive dysfunction (“dementia”) in older cats
• Gastrointestinal pain or chronic discomfort
• Any other condition causing pain or distress
Medical causes should always be ruled out before focusing on behavioural treatment alone.
Frustration and redirected behaviour
Cats experiencing frustration sometimes direct behaviour towards people (or other cats) in close proximity even when the person is not the original cause of the problem.
This may occur when:
• A cat sees another cat outside but cannot chase it away
• Access to outdoor space is suddenly restricted
• Access to desired resources is blocked
• A cat becomes highly aroused during an external event eg a loud noise startles it
In some cases, a cat may suddenly bite or attack a person immediately after being exposed to an unrelated trigger, which is known as redirected frustration. Attacks in this context can be extremely serious as the cat is so highly-aroused.
Play behaviour and overstimulation
Some cats bite or scratch people during play or physical interaction. This is particularly common in younger cats, cats living without other feline companions, or cats who have learned to direct play behaviour towards people.
This may include:
• Chasing ankles or moving feet
• Biting during play
• Grabbing hands during interaction
• Escalating behaviour during stroking or physical contact
Some cats also become overstimulated during physical interactions, such as when they are stroked, and may suddenly bite when their tolerance threshold has been exceeded.
Stress and emotional wellbeing
Cats living with chronic stress often become more reactive and may have a lower threshold for biting, scratching, or other unwanted behaviours.
Stress-related causes commonly include:
• Conflict between cats living within the home
• Competition over resources
• Lack of safe resting or hiding places
• Unpredictable daily routines
• Repeated exposure to frightening or stressful situations
• Outdoor cats visible through windows or entering the garden
• Chronic frustration caused by environmental restriction
Stress can affect behaviour long before more serious problems become obvious, although even ongoing low-level stress may significantly affect welfare.
Why punishment makes the problem worse
Punishing a cat after biting, scratching, or swiping often increases anxiety and may make the problem significantly worse. It can also damage the cat’s relationship with people, causing the cat to become increasingly fearful or wary. Cats do not display these behaviours out of spite or malice, but as defence mechanisms or a way to regain control. Successful treatment depends on understanding why the behaviour is occurring rather than simply trying to stop the behaviour itself. Punishment should never be used - this includes physical punishment, shouting, or using negative actions to stop the behaviour, such as spraying with a water pistol.
What should I do if my cat attacks me?
• Move away calmly and quietly if possible – ideally backing out of the room slowly and shutting the door behind you
• Use a cushion or blanket as a barrier to protect yourself from bites or scratches (avoid using hands or feet)
• Throw treats away from you in order to redirect the cat’s attention (this may not work if the cat is highly aroused)
• Avoid shouting at or punishing your cat
• Do not attempt to pick up or restrain your cat immediately after an incident, as it can take hours or even days for them to fully calm down
• Give your cat space and allow them to retreat to a safe area without further interaction
• Try to identify what happened immediately before the incident, as this often provides important clues about the trigger
• Avoid repeating situations which may trigger further incidents where possible
• Arrange a veterinary examination for your cat so that underlying medical causes can be ruled out
• Seek medical advice if you have been bitten, as cat bites can lead to serious infection
How a behavioural assessment can help
A full assessment looks at:
• Complete medical history and previous veterinary investigations
• The exact circumstances surrounding each incident
• Household layout and environmental set-up
• Relationships with other animals within the home
• Daily routine and predictability
• Potential sources of stress or frustration
• Previous attempts made to manage the problem
• The cat’s emotional wellbeing and overall welfare
I then create a tailored management plan aimed at addressing the underlying cause and reducing the risk of future incidents. This may involve environmental modification, reducing stress or frustration, changes to handling practices, behaviour modification, further medical investigation where appropriate and, in some cases, behavioural medication.
Biting, scratching and other unwanted behaviours can become more frequent or severe over time and may result in significant injury. Cats who begin showing behavioural changes should always be assessed by a veterinary surgeon so that underlying medical causes can first be ruled out. If you are bitten or badly scratched, please seek medical assessment as treatment may be required.
About me
As both a qualified Veterinary Surgeon and Clinical Animal Behaviourist with a particular focus on cats, I understand that behaviours such as biting, scratching and swiping often involve complex interactions between physical health, emotional wellbeing, previous experiences, and environmental pressures. My approach focuses on identifying the underlying cause of the behaviour rather than simply trying to stop the symptoms.
Finally…
If your cat has started biting, scratching, attacking, or showing sudden behavioural changes around people, a behavioural consultation can help identify the cause and develop a practical plan tailored specifically to your cat and home environment. In some cats, biting or scratching people may occur alongside other stress-related behavioural problems such as conflict between cats living within the home, overgrooming, or wider behavioural change associated with stress or anxiety.
Contact me here to book a consultation.
This page is intended as general guidance only and is not a substitute for veterinary examination, diagnosis, or treatment. If you have concerns about your cat, please speak to your registered vet.