The cat does not suffer from any symptoms of illness, but by chance when I did medical tests in order to sterilize the cat, some deficiency in kidney function was discovered, and he ate dry food for this case for 3 months, and he is now eating healthy homemade food with a low protein content, perhaps He needs from time to time to re-analyze kidney function to be reassured. Therefore, he is incompetent to undergo operations or anesthesia.