I have had loads of problems with Fifi - i think she has had it about 7 times this year !
She has had a through examination, x ray , scan -nothing there.
Then i have tried cystease -she hates taking tablets and kept running away from me and she was also sick with them , had the same problems with Zycline(sp) .
I ended back at the vets where she had convenia (sp) injections, long lasting pain killers and up to now has been ok for the last 6 weeks -heres hoping.
It seems like the injections were the only thing that worked !?
Also got Feliway plugged in the bedroom she sleeps in - now she spends more time down stairs that she ever did !!!!
Talk about a contrary cat !!!!
Good luck with getting it sorted -its awaful to see them in and out the trays and squatting for ages