Good food for Siamese cats:
1. Staple food: Cat food is the best staple food for cats.
2. Canned foods: can provide nutrition.
3. Meat: You can cook some chicken breast to feed your cat.
4. Offal: Chicken liver and pork liver are rich in protein, fat, and carbohydrates, and have high nutritional value.
5. Fruits: such as apples, watermelons, cantaloupes, pineapples, papayas, strawberries, bananas, honeydew melons, etc. 
Foods harmful to Siamese cats:
1. Seafood, such as cuttlefish, shrimp, clams, squid, and filefish. These foods contain a relatively high amount of thiaminase, which is difficult for cats to digest and can easily cause allergies.
2. Foods high in salt: Cats are very sensitive to salt. If the salt content is too high, it can easily cause salt poisoning in cats, as well as worsen eye discharge and put a heavy burden on their kidneys.
3. Milk. Cats cannot digest the lactose in milk, so it may upset their stomachs or cause diarrhea. Except for kittens drinking their mother's milk, it is not recommended to give cats milk.
