yeah they do, not too badly priced.
hugos got ongoing pee problems despite being on cystese, was in the vet for the day last week and had xrays and scans and blood tests. found nothing.
got to put him on Hills C/D for 6 weeks with the cystese and see if that kicks it. otherwise he's got to go in for a general anaesthetic and a catheter inserted to see if there is a plug in his urinary tract. ouchy.
Is he on dry food or wet food?
My cat had regular bouts of cystisis for around 3 years, at the time he was on Hills dry food (he's always been prone to be a fatty) so we switched him to the Hills wet food variant and he's never had cystisis since.
He's always been terrible at drinking water so the dry food must have been partially dehydrating him...