My 6 and a half year old guinea pig (lively old soul) came home today and has been worryingly quiet. One evening I got her out and found that her stomach was swollen, took her down the vets the next day and the vet said that she might have a lump but because she's be acting relatively normally we should just keep an eye on her. A few days later she had been squeaking loudly while weeing, I then saw blood in her cage. Took her straight back to the vets and he booked her in for x-rays the very next day. She went in and they found that she had a large stone blocking her uretha. They operated on her and successfully removed a stone, around the size of a pea, however they had to cut into her bladder a little. They kept her in over night because of this but said that she was eating and drinking well. We picked her up today at lunchtime and have kept a close eye on her. She hasnt touched her food or water and hasn't drunk. We gave her her baytril (antibiotic) and also managed to get her to eat a piece of carrot. As she hadn't drunk we syringed her some water. It's now gone midnight and she still won't eat or drink, and is just looking sad sat in the corner of the cage. She wee'd a bit, which had some blood which they said to expect but she hasn't pooed at all.I know that she's probably in a fair amount of pain it just doesn't seem like she's like she was at the vets. Any one have any advice of suggestions?