Not sure if this would help with these types of stones
A probiotic called Azodyl
www.entirelytpets. com is recommended for kidney/bladder stones. Use it at half the recommended dosages (it's marketed for kidney failure and that's what the dosages on the bottle are for). It's helped clear up crystals / stones in many dogs, as well as protein in the urine.
(this was from my Yahoo Group)