1. Parasite infection. A cat with intestinal parasites will have foul-smelling feces, and sometimes worms can be found in its feces. In this case, the cat needs to be dewormed promptly.
2. Feeding your cat low-quality cat food. Low-quality cat food has a high grain content, and if a cat eats too much of it, its feces will become foul-smelling, and it may even experience soft stools or diarrhea. It is recommended that pet owners choose high-quality cat food from reputable brands for their cats. 
3. Insufficient water intake. If a cat doesn't drink enough water, it will experience difficulty urinating and defecation, causing feces to remain in its intestines for a longer time and resulting in a stronger, more smelly odor. It is recommended that owners regularly monitor their cat's water intake to ensure adequate hydration, which is also beneficial for the cat's urinary system.
4. Indigestion. When a cat has indigestion, its feces will have a strong, pungent odor and be very smelly. Owners can regularly feed their cats pet probiotics to help regulate their digestive system and reduce the occurrence of indigestion.
