Hi
HUGS
I am very sorry for your problems.
My Hywel suffered gut adhesion in the wake of blood bacteria causing a band of swelling at the back of the groin; the band of swelling could be clearly palpitated - about 2-3 weeks post-op. It is a very rare complication and resulted in massive pain, quick loss of weight/total loss of appetite/apathy and a very fast deterioration.
The operating vet (via a local rescue) had no idea and didn't want to do anything but I did at at least get some painkiller out of him when Hywel was seen on the Friday afternoon in the time before the UK got mandatory vet cover. Forum members helped me with further tips late at night and
@furryfriends (TEAS) managed to get Hywel an emergency appointment after the weekend at the Cat&Rabbit Care Clinic in Northampton. With tiny but frequent round the clock feeds Hywel was being kept alive over the weekend. At the Cat&Rabbit he was put on zithromax (two courses) and high metacam for the long term to get the band of swelling down. Thankfully, it contracted away from the gut and not further towards the gut, which would have meant the end of him. Hywel did make a full recovery and lived a very happy and fulfilled boar life for another 5 1/2 years until very shortly before his 7th birthday.
However, your problem sounds different. Just to rule out that point.
I am very sorry about the bladder trauma.
New stones or sludge can form to quite some size within just a few weeks after a bladder op; it is the most dangerous time for a bladder piggy. Any dietary measures take several weeks to come through in the body and - depending what is going wrong with the calcium absorption process - the stone removal operation cannot stop it. We have had piggies needing a second bladder stone op in very quick succession but they have come through that. There is usually not a third large stone because by then any changes you make with feeding is kicking in; at the worst, you are facing recurring sludge or grit if the calcium processing remains disturbed. My Cariad still lived another 2 years, including a full-on emergency spay just a few months later when her womb went horribly wrong and reached the average life span of 5 years despite her weight never climbing above 700g again.