Renal Kidney Failure How Many Of Yuor Cats/dogs Have C.r.f.(chronic Renal Failure - Kidney Failure ) ?

How many of yuor cats/dogs have c.r.f.(chronic renal failure - kidney failure ) ? - renal kidney failure

I do a survey for my stepmother, whos cat has chronic renal failure, meaning kidney failure! I just try to see as common in dogs and cats!

ps
We have 2 cats with chronic renal failure!