When a cat has soft stools, the owner should check the cat's food. If the food is rotten, spoiled, or has an unusual odor, the cat will experience soft stools after eating it. Cold food, human food, onions, milk, and other similar foods should also be avoided by cats, as these can irritate their intestines and lead to soft stools. In this case, the owner should withhold food from the cat for half a day or a day, and then replace it with fresh, clean food. 
The cat's digestive issues could also be the cause, which can significantly impact its health and growth. Owners can take appropriate measures, such as giving the cat probiotics or providing small amounts of honey water daily.
When parasites are in a cat's body, they can severely damage the cat's intestines, absorbing its nutrients and causing soft stools or diarrhea. This can be confirmed by observing whether the cat's stool contains blood or white, unidentified substances. Owners can also take their cats to a veterinary clinic for a stool test to identify the type of parasite before deworming. Afterward, they can continue to feed their cats probiotics for support.
