Methods to prevent kidney disease in cats:

1. Take cats to the pet hospital for regular check-ups, especially old cats over 8 years old.

2. The owner can choose low-phosphorus foods, which can reduce the prevalence of kidney disease.

3. Let the cat drink more water. Insufficient drinking water intake will increase the burden on the kidneys.

4. Let cats avoid harmful and poisonous plants and food to avoid accidentally eating them and causing kidney disease.

5. Ensure that the cat defecates and urinates normally and ensures that it can reach the cat litter box at any time to prevent the cat from being unable to urinate normally and causing kidney disease.