Thanks for the welcome and for the info, she hasn't been ill since yesterday so I would say that it was a reaction to the anaesthetic. Was a bit of a worry last night due to not being able to contact anyone directly for advice. The vets have an after hours service but its for emergencies only, abusing that service just isn't something I could do being as it could take time away from someone who did need urgent assistance. Anyway, thanks again for your responses, I really appreciate it.
As far as I know Prolet is an anti-inflamitory(sp) drug, reasonably new on the market. I wasn't able to find any info lastnight about its side effects.