Hello, I have a little guinea pig Pepsi she is 6 years old, December she started to go downhill a little noticed not eating and lots and lots of water took her to the vets she had lost weight, weighed in at 675grams he couldnt feel anything at that time checked teeth as best he could but nothing that stood out she just went off her nuggets, she eat all the fresh veg and hay it was the water drinking that concerned me, however last week noticed a lump on her bottom, sorry I'm no expert very close to her other bits, took her back to the vets where she seemed to be in pain on her bladder she has given me some antibiotics baytril 0.3mils once a day and metacam up to the 3 mark once a day(if that makes sense) she is eating fine her wee is clear no blood her poops are fine, i have noticed that her lump now seems really soft, she has been on her meds since Monday evening the vet gave her the first dose, so what I'm asking to any experienced guinea pig owners do you think its bladder stones I'm hoping its just a infection in her uretha? maybe