She is, yes - she's currently taking:
Fibreplex - 3x a day (this is prebiotic and probiotic I believe)
Emeraid - as much as we can get her to take, ideally 4x 18ml a day according to the packet but we're struggling to get that much into her
Emeprid - 0.7ml 2x a day
Metacam Cat - 0.7ml 2x a day
I'm also offering water as regularly as she's willing to take it and have taken her off fresh veg as this seems to be the advice for stringy poop - happy to be corrected as she seems very jealous of her sister's basil and lettuce!
Trying to get her to take 18mls in one sitting when she has no appetite is simply too much in one go.
40-60ml is emergency level where there is no appetite.
Ideally 60-90ml per day though but in a very unwell piggy it may simply not be possible.
You need to be feeding little and often - feed less in one go but feed her every 2-3 hours.