The Reasons And Things You Need To Know About Unexpected Behaviour In Cats

abnormal behaviour in cats

Cat behavioural problems can be caused by a number of factors. The most common is behavioural unpredictability – this means that something that normally happens doesn’t always happen the same way, or in the same way every time. Other reasons for abnormal behaviour in cats are stress and boredom. If your cat becomes bored, it will look for ways to entertain itself, and this can result in chewing things around the house as well as creating destruction in your home.

Keeping Personal Spaces Clean

A dog that is lying down and looking at the camera

Many animals, including cats, enjoy keeping their personal spaces clean. Unfortunately, when a cat becomes bored it will often look for ways to ‘stay entertained’. This can result in scratches on your furniture, in your possessions and on your skin. Boredom and behaviour like this will often lead to your cat becoming distressed and may even snap at you or other members of the household.


A lion lying in the grass

Boredom and behaviour like this are very common in household cats that have not been properly trained. They are often kept indoors in overcrowded accommodation. A bored cat will search for its own entertainment and this can lead to scratching furniture and scratching walls and doors. Boredom can also lead to excessive marking of its territory, particularly around the outside of the house. This is often so bad that the cat will chew items that it finds outside its home to try and comfort it. If this happens on your furniture it could represent a health hazard.

Aggression Towards Humans

One unusual but possible behaviour in cats is marked aggression towards humans. This can be very distressing for the cat owner as cats are renowned affectionate and friendly pets. However, if your cat becomes noticeably aggressive towards people then it could be a sign of illness. Cats can be very defensive and if they see another cat approaching they can quickly turn on their owner to try and scare off the stranger.

Nutritional Deficiencies

Abnormal behaviour in cats can also be caused by nutritional deficiencies or food sensitivity. An example of this is a cat not eating its usual diet due to an allergy. Sometimes this can be resolved by giving the cat its normal diet but in some instances it can only be resolved by changing the cat’s diet. Other examples of strange food reactions include an intolerance to garlic, which will cause the cat to not eat garlic but to instead attempt to eat things like onions.


Some strange behaviours in cats are clearly a sign of illness. A cat not using its litter box could be suffering from a health problem. Similarly, an apparent lack of appetite could be a symptom of diabetes. If you notice these symptoms in your cat and believe it may be sick then you should take it to your vet.


Other unusual behavioural changes in cats could be associated with stress. Cats react very negatively to stress, so if your cat is behaving oddly and is becoming destructive of its home then it could be because it is worried about something. Some signs of stress in cats are aggressive behaviour such as circling the house and staring at people. Again, if you have any doubts about your cat’s stress then you should take it to a vet.


It is important to note that although cats can exhibit abnormal behaviour, they are usually only occasional and should not be cause for alarm. In most cases it will disappear within a few days to a week. For persistent abnormal behaviour in cats then it is best if you consult a vet. Vets can often pinpoint the cause of the problem and make sure your cat receives the appropriate treatment. By doing this, you can avoid future incidence of abnormal behaviour in cats.

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