Pet cats can eat rice, but eating too much can cause diarrhea. Rice is mainly composed of starch, which can provide cats with some energy and nutrients. However, cats are carnivores, and it's not recommended to feed them rice. Their digestive systems are very sensitive, and they are picky eaters, so it's best not to feed them rice. The nutrients in rice cannot be adequately provided for a cat's digestive needs, and it can easily cause indigestion, especially diarrhea. 
Precautions for feeding rice to cats:
1. It is recommended to feed them porridge, which can be boiled or steamed.
2. It is best to add some meat or vegetables to their rice. This will not only provide them with better nutrition and enhance the flavor of the rice, but also make it easier for them to eat.
3. Don't put too much salt in the rice you feed your cat.
