Causes for cats suddenly having soft stools:

1. Gastrointestinal discomfort
If a cat eats spoiled cat food or rotten food, causing gastrointestinal discomfort, This will cause the cat to have soft stools, and the cat needs to be fasted for half a day and then observe the cat's condition.
2. Parasites
If a cat is infected with parasites, it will also have soft stools. The owner should give the cat an internal anthelmintic drug in time.
3. Feline Distemper
If a cat suffers from feline distemper, it will also have soft stools, accompanied by symptoms of vomiting, lethargy, and fever. The cat needs to be taken to a pet hospital for treatment in time.
4. Cold
If a cat catches a cold and catches a cold, it will also have soft stools. The cat needs to be kept warm and fed cold medicine.
5. Lactose intolerance

If the cat drinks milk, lactose intolerance may also cause soft stools. Stop feeding milk immediately and fast for half a day.