Take a look at a traditional-style Japanese meal made for the cats. It's a set menu (miso soup, rice with furikake, and fish) except the food is all made out of cat-safe ingredients.
The hungry cats like the Japanese meal for cats. It is funny how they even eat the food from the table and from the chairs.
Cats can be addicted to tuna, whether it's packed for cats or for humans. Some tuna now and then probably won't hurt. But, cats should not extremely overdose on canned fish products. A steady diet of tuna prepared for humans can lead to malnutrition (for cats) because it won't have all the nutrients a cat needs. And, it seems that too much tuna can cause mercury poisoning.