The kitten was listless and kept sleeping.
Lethargy and excessive sleepiness in cats are early symptoms of many diseases. It is recommended to take them to the vet for examination and diagnosis before treatment. If the kitten has not been vaccinated, feline panleukopenia (feline distemper) may be suspected, which can be diagnosed using a test strip or PCR. In addition, feline infectious peritonitis (FIP), liver disease, pancreatitis, and other diseases can also present with lethargy and excessive sleepiness in their early stages.
If your cat is lethargic and sleeps a lot, it's very likely that it's anemic. You need to feed it nutritious food that helps with blood replenishment to help it recover.
Feeding a cat only a single type of cat food will not provide the necessary nutrients for its body. If the owner does not choose the right cat food, not only will the cat not receive the necessary nutrients, but it may also harm its health. Therefore, owners should buy cat food from reputable stores. 
1. Adding nutritional supplements
A cat's diet shouldn't consist solely of cat food. To supplement their diet, owners need to provide nutritious complementary foods such as chicken liver or duck liver, which can be fed in small amounts once or twice a week. Additionally, meats like fish or beef can be given 3 to 4 times a week. These methods are helpful for cats with anemia, and owners should be consistent in their feeding practices.
2. Give the cat blood-nourishing paste
Fresh food may lose nutrients due to storage or other reasons, or the cat may not be able to fully absorb them. A cat that doesn't get the necessary nutrients will become weaker, so owners can give their cats blood-nourishing supplements to help them recover.
3. Fruits and vegetables are essential.
Fruits and vegetables are rich in nutrients and can supplement cats' diets with vitamins and iron, which are beneficial to their health. Therefore, cat owners can feed their cats more fruits and vegetables on a daily basis, such as spinach, apples, and carrots.
Cats have delicate bodies. If you notice any serious symptoms in your cat besides sleeping, take it to the vet for a checkup as soon as possible.
