Really sorry to hear this Jackie
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I've only just caught up on this thread.
Have they said for definate that it has gone to full blown FIP or just showing signs of exposure to a Coronavirus?
If the poo sample came back clear... ask them to re-test for Trichomonas. (spelling!?!) You have to specifically ask for the test as its not done as standard. Cost for the test is around £40 (well it is up here)
It seems to be rife with certain breeders and can show up no signs on a regular poo test but can be mistaken for FIP / Coronavirus .
Just about every cat probably has a coronavirus antibody level did they tell you what yours were fro the bloody tests?
Treatment for this is Metradizonal (spelling?!!)... but Stomorgyl contains adequate doses for 10-12mg per kg. A 10 day course of this will start to show signs of improvement if it is Trichomonas. Maybe worth speakign to your vet to see if that would help??? could be worth a try?
We've been down this road with rescued pedigrees quite a lot in recent years.
Good Luck with tests, etc. Really hope that they start to show signs of improvement soon.
Sxx
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