1. If a cat is malnourished from a young age, its skin and fur will be affected, which can easily lead to sparse fur. Owners should feed their cats more nutritious food.
2. When a cat suffers from a skin disease, it can cause the cat's fur to thin. The owner should take the cat to the vet for treatment in time. 
3. When cats are in their molting season, they will shed a lot of fur, making them look like they have very little fur. This is a normal physiological phenomenon.
4. Bathing your cat too frequently can make its fur very fragile and cause it to shed. Bathing your cat once a month is sufficient.
5. Using human shampoo on cats for a long time can also cause their fur to thin. You should use special pet shampoo products to bathe them.