Causes of Foul Smelling Faeces in Kittens


Foul smelling faeces in kittens can be more common than you think and if you notice that your kitten is emitting stools that smell extremely bad, there are a few reasons why it may be happening. Here are some of the most common culprits for foul-smelling faeces in kittens.

Normal Stools

“Normal” stools for cats should be formed and firm. They should not be overly hard, soft or runny in consistency with no unusually strong smell. Ideally, they should be dark brown in colour and with no strong smell. Anything outside of this should be viewed as a cause for concern. If you’re worried that your kitten’s stool is not “right”, try to get a small sample of it for your vet to test to determine the underlying cause(s) of the problem.

Dietary Factors

If your kitten is otherwise bright and well, it may be that their diet is causing unpleasant changes to their stools.  Make sure that your kitten is on a good quality well balanced food that is appropriate for their age and development, and avoid sudden or abrupt changes to their diet.

If you think that your kitten’s diet is to blame, it’s a good idea to speak to your vet before you change their diet. This will help to ensure that their diet is the most probable cause of the problem and to make sure that you go about things in the best way.


Parasitic worms are another possibility, especially if your kitten has had them previously. This can sometimes be indicated by symptoms such as weight loss and diarrhoea, and a big infestation may lead to abdominal distension in kittens. However, there will not always be obvious symptoms and those that do occur can be vague. Speak to your vet about a de-worming programme if you suspect that your kitten may have picked up worms.


Gastrointestinal infections are another potential cause of stool changes, which would be more strongly suspected if your kitten also appears generally unwell.

If you’re concerned about your kitten’s stools, speak to your vet about the possible causes and treatment options. They can then determine what the underlying cause of the problem is and ensure that the most appropriate treatment is given as promptly as possible.