I was very impressed with your answer; but my cat did not have an infection and as a house cat was not in contact with any of the toxins you mentioned. I can only think, as you stated that as a pedigree who had a rather shaky four years locked in the top of a pub (how can anyone do that to an animal?) 14 wasnt as bad as some people were leading me to think. I got in touch with the Burmilla Cat Club who said that for Burmillas that the average age for a Burmilla about 15 so I dont need to feel guilty. It is perfectly true that pedigrees are more fragile. Also by mixing pedigrees we are often on foreign ground.
I was very grateful for your advice.
JUST ONE MORE QUESTION I PROMISE! I did mention at the outset that my Burmilla had blood coming from her urinary tract - this almost never happened at the same time as passing urine. Can the appearance of vast quantities of blood be an indication of kidney disease or this solely attributable to cystitis?