Thanks Gillian. I am never sure when companies suggest an alternative so your info helps a lot.
It isn't bacteria Mark. She's had every test the vet could think of and everything came back clear. As I said, it cost me £500 to investigate.
The thing is the last time she actually had a bought of Cystitis was BEFORE the first kittens of the year arrived. She hasn't had an attack since April... but as soon as we clear the kittens out madam starts up with her lady problems again.
You'd have thought that if having kittens around upsets her, she would become ill while they're actually here during that 3 month period.
Not that she has ever been allowed to mix with the kittens for everyone's sake... but she has no access to the bathroom when we have kittens and she can hear them through the closed door.
We did at one time think that she didn't like the dark winter nights and that upset her as she was getting it every month over the winter.... but it's the middle of summer now and she's got it again.
I've looked at it from the diet angle as well and it doesn't seem to be that. It's a mystery.
We've counted up and since last September/October she's had Cystitis 7 times.
Like I said, it clears up within a few days of treatment.... so I'm just going to give her a pill every 1-2days from now on I think.