Living in the close proximity to Chicago everything is available here...I do know few holistic vets in my area but thankfully we did not have need to go beyond our routine shots...
What are you facing is appear to be chronic situation, probably related to multitude of reasons such as some anatomical impediment for free urine flow, food, supplements, water, for all you know her parents lines might carry predisposition for kidney stone formation.... While it is not clear with humans how much stone formation is genetic vs environmental I would suspect there is no simple answer either, but we are mostly what we eat so I would start there...
therefore I see need of going holistic road, starting from adding some natural herbal remedies that have been used for loooong time to heal kidney /urinary problems, possibly adding something to the water like cube of broth to make your pup drink more to flush those kidneys more often. I would also check on homeopatic remedies X dilution, while it would never be a first line treatment, chronic problems when something just is not working right is great for homeopatic remedies...
I would also consider going off kibble and start home cooking or raw food diet...I know few people whose dogs developed kidney stones with obstructions and had to have surgeries- lots of mess and $$ but after changing to home cooking or raw food kidney functions were no problems anymore... it is anecdotal evidence of course, but it is eating processed food that lead humans to all those wonderful social diseases like high blood pressure and diabetes...