Thank you everyone for your concern. The Boneyard is a wonderful and caring extension of family! I think we're out of the woods, at least for now.
Since she only ever had the one stone that was way too big to pass, she had no experience with the 'joys' of moving a stone from kidney to bladder via the ureter. Evidently, after they pulverised it, one of the larger, sharper chunks decided pretty quickly to go for a ride down the ureter and naturally got lodged not too far in. As anyone who has ever suffered from kidney stones knows, that typically produces excruciating pain, high fever and nausea. But it happened so soon after the procedure, she was still under the influence of the antibiotics and the narcotics. So her temp didn't go up, and she didn't feel much of the pain, yet she displayed the outward symptoms of a kidney stone attack. And overnight stay with both a steady saline IV and constant water drinking appears to have flushed the stone remnant through the ureter into the bladder, so all is well this afternoon, and she is home resting comfortably -- for now.
X rays show a couple more comparable sized shards, so there may be a similar episode or two in the near future, but next time, with the pain and perhaps a bit more of an elevated fever, since the amoxicillin and percocet she's got for home use doesn't compare to the antibiotics and anesthetics she was on in the hospital. But I've been informed that if she passes them quickly it shouldn't be too big an issue, since the ureter is already stretched out from the first one, and apparently will take some time to return to normal, so there's a good chance the larger remnants will vacate the premises without becoming lodged in the ureter. She's just got to drink crazy amounts of water to get them moving in a hurry.
Thanks again for all the prayers and well wishes.