Adult cats can eat kitten food. In cases of food scarcity, adult cats can eat small amounts of kitten food for a short period without any adverse effects. However, it is not recommended to feed adult cats kitten food long-term. Owners should choose cat food that is suitable for their cat's current condition to ensure their cat grows up healthier. 
What to feed your cat as an emergency if you don't have suitable cat food?
1. You can temporarily feed it canned cat food, freeze-dried food, chicken breast, beef, fish, egg yolks, etc.
2. You can also feed your cat some rice, noodles, brown rice, oats, etc., to provide it with some energy.
3. You can also feed your cat carrots, eggplants, bean sprouts and other vegetables, but it is best to cook them before feeding.
