Four-month-old kittens need to be fed kitten food. The amount of kitten food to feed should be based on the instructions on the kitten food you buy. The energy content of each brand of kitten food is different, and the daily feeding amount will also vary slightly. Just refer to the recommended feeding amount on the packaging. 
Precautions for feeding 4-month-old kittens cat food:
1. Feed at regular times and in fixed amounts. The best way to feed a cat is to feed it at regular times and in fixed amounts, because cats cannot control their food intake. Giving them too much at once can easily lead to overeating, which is not good for their growth and development.
2. Suitable cat food. Adult cat food is not easy for kittens to digest. It is recommended to choose cat food specifically formulated for the kitten's age. This will ensure that the kitten gets the appropriate amount of nutrition at the right time and reduce problems such as indigestion and inappropriate nutrient intake.
3. Feed small, frequent meals. Kittens are growing rapidly and need a lot of nutrition, so they need to be fed 4-5 times a day. However, the portion size at each meal should not be too large, otherwise they will not be able to digest it all. It is recommended that owners feed their cats at regular times and in measured amounts, allowing them to eat small, frequent meals, which is better for their digestive system.