2972. A 15-year-old cat has bladder and kidney stones now

Bladder stones of this 15-year-old cat were removed some months ago at Toa Payoh Vets. I advised change to Feline C/D diet to prevent recurrence. The old cat just would not eat the new food which should be given gradually.

So, the owner fed back the old dry diet.
Recently, the cat was ill and x-rays showed multiple stones in the kidneys and bladder.