I wonder if it might be a good idea to get some urine test sticks? I had to order mine online as I couldn't afford £45 at the local pharmacy (that £45 is better spent at vets!) and found a tub of 100 for about £10 delivered. They cover various tests, main ones I was interested in were blood, glucose and protein. The urine can look clear and still have traces of blood due to an ifection or stone (at least stones can be ruled out now), and a test each day might give an idea as to how things are progressing. They're no substitute for a knowledgeable vet, but they are an excellent method for giving yourself a clearer picture at home all the same.
With regards to feeding, every piggie I've had that has for some reason refused to eat for themselves has lost approx 10g per hour if not syringe fed. So all I can suggest is to weigh her at least daily, and ideally maybe last thing before bed, and first thing when you get up. I try to get 6 hours sleep when syringing to give me and the piggie a break, so if you did the same then you may see up to around 60g drop. That would tell you if she's doing nothing for herself. Although if she's got digestive speed issues then that might alter things...
If her guts are moving too slowly then her appetite will be vastly reduced and she won't be getting enough nutrition. If they are moving out of rythm (or too fast, but no runny bum) then what goes in might struggle to come out. I've been through both, and the only way I knew about hypermotility/ rythm was the vet I saw listened to her back end and there were far more "waves/ gurgles" than there should be. Either way an injection of Metaclopromide is very useful, and I think given her eating problems it's well worth bringing this up with your vet asap. It can take effect in as little as an hour or so, but can be as long as 12 or more hours before you see it working. I'm not saying she *has* got gut motility issues, but it's very much something to consider, and as it can be very serious it's better to jump on asap. Probably tomorrow now, unless your vet is open late this evening.
Things have been hell here so I've not been reading each thread in detail, but did I see the vet is giving Baytril for the UTI? Baytril in my experience isn't very effective against UTIs, and it *is* quite unpleasant on the digestive system. I know many vets still see Baytril as the only available/ effective antibiotic for piggies, but I find Septrin far more effective for UTI and respiratory problems in most cases. The Septrin should be Paediatric, at a rough dose of 0.4 or 0.6ml twice daily for an approx 1kg piggie. Some Vets either won't give it as it's unlicensed for piggies (though they'll flog you cat or dog Metacam, which also isn't) or because they've not heard of it. Not only is it more likely to help with a UTI than Baytril, it is also far kinder to the gut bacteria. Piggies have such delicate digestive systems that when there's a medication that is likely to be more effective *and* less damaging to the natural gut balance, I really can't see a reason not to use it.
You need to keep up with a probiotic in conjunction with the antibiotic, given between one and two hours after the antibiotic. I add Avipro to the cranberry/ water when syringing, and also a pinch in the syringe food.
I see you've read my post on the other thread, but just to add a bit more on feeding on here - I aim for total dry weight of food in a day. 2ml syringed could be any amount of actual food value depending on how thick it's made, whereas if you look for a target weight of food in a day you can get a far better idea how many feeds are needed if it's slow going. If you use 30g dry food as a minimum, that can be between 70ish ml and 120ml when watered down to syringe depending on how easily she'll take it. I can't ever see 2ml at a time being anything like enough unless you annoy her with syringes every half hour!
Metacam is good stuff, but I suspect the vet will have said "give her one drop a day". Having sat and measured drops one evening, a drop can vary between 0.03ml and 0.07ml. That could be too little for nearly every piggie, or too much for a small one, depending on which drop you got that day! With the dog Metacam (1.5mg per ml strength) I seem to recall the dose is 0.1ml per kilo (using
http://www.guinealynx.info/analgesics.html as a dose guide - 0.2milliGRAMMES of 1.5mg/ml Metacam safely works out at 0.1milliLITRES when giving. Important to stress NO MORE THAN 0.1ML as this stuff is very potent). Difficult, but not impossible to measure out with a 1ml syringe. I now have cat Metacam here as I have a poorly degu, and it's 1/3 the strength making it easier to measure in a syringe (he has to have around 0.03ml a day, or 0.01ml of dog Metacam.. You try getting that right first thing in the morning!). My suspicion is she's got no real appetite because she's in pain due to her bladder, and has slowed up a bit as a result of not eating. You MUST of course discuss this with the vet, but I personally would be looking at giving an accurate dose of Metacam, 0.4ml twice daily of Septrin, and getting a Mataclopromide injection as soon as they open in the morning. Plus upping the feeding (if she doesn't naturally pick up a bit on that after pain relief and Metaclopromide) to ensure she gets a full days worth of food in her to promote more healthy digestion.
Good luck!