I do agree that the restricted diet isn't doing a thing to prevent stones. Maybe it keeps them smaller, who knows, but I don't believe the hype on the low calcium diet anymore. Her cage mate who is mostly on the same restrictions for ease, though she does get lettuce and carrots when she's out by herself, has not had problems. So I'm not going to feel bad giving Nibbles a bit of lettuce here or there.
Sef, thanks for sharing your experience with stones. It helps keep things in perspective. We'll keep going on our current path but if there is no change I'll look into that bladder stone formula. I'd like to have more data on the current regimen first.
I told her we had to keep Nibbles at two tablets per day, not just one, otherwise she acted off. The vet speculates that the muscles of her bladder don't work correctly and that's why she is uncomfortable when she's only on one tablet or no tablets. The urine doesn't empty properly and that build up contributes to the stone formation. The tablets let those muscles relax so she can empty the bladder.
So good that we have a treatment that works and that's she's not forming hundreds of stones. And I'm even less concerned about giving her things occasionally that are not on her prescribed diet.
So crossing fingers that this is the worst we'll have to see in her.