Hello everybody! I have a guinea pig, his name is Toni and he is 3 years old. 2 weeks ago I took him to the vet because he was peeing blood and was straining while urinating and pooping. I assumed the worst and thought it was a bladder stone (and upon getting him x-rayed, it turned out it was). The vet had put Toni on Sulfameth and Meloxicam for about a week, and I was seeing some improvement as he wasn't in pain when he pooped and he wasn't straining as much. I came back last Tuesday and proceeded to schedule the cystotomy which will be in 2 days (Feb. 13, at 8-9 am). He has run out of his Sulfameth and Meloxicam and hasn't gotten any refills. He seems to be doing worse when he tries to use the bathroom, straining much more than he was before and squeaks more often and more loudly. He's still active during floor time, but his appetite has decreased (he was 1064g yesterday, and today he is around 986g). The stone seems to have grown as I can feel his bladder and it feels hard compared to when I brought him in the first two times (the vet and I couldn't feel it at all). I've been syringe feeding him vitamin C as per the vet's orders and have critical care for him which I will start giving him, but I'm a little worried about the effects because if he stops eating he will go into gut stasis, but he seems to be having such a hard time defecating and urinating. I'm unsure what to do as this is the first guinea pig that I've had that has gone through this (I've had 3 others before him who didn't have any problems besides one with a head tilt). Is there something I could do to have him be in less pain whenever he poops or pees? What else should I do while I wait for the day of his cystotomy? Any and all tips and advice are appreciated! Thank you!