Here is a secret recipe that my Panamanian mother and father have used for years with every friend, relative and animal (cats) that developed kidney stones
and wanted an alternative to the lazer surgery or natural passing:
1 dozen eggs
3 cups of fresh lemon juice
Wash shell of eggs carefully as not to break them. Place eggs in shells in a large bowl. Juice lemons. Pour juice through strainer and remove all pulp. Pour fresh lemon juice (concentrated will not work) over shelled eggs (DO NOT BREAK EGGS). Cover eggs with juice and place in the fridge for about 2-3 days.
What will happen is the lemon juice will break down the shell of the egg into a white liquid. What remains is the 12 whole eggs inside of a protective membrane. Carefully remove and discard the whole eggs with yolk and all. All you want to keep is the lemon and shell liquid mixture.
Drink this mixture daily for at least 1 week (1tbs 3 times per day for humans - 1 teaspoon 2x per day for cats and dogs) - stones will break up and pass in urine. This mixture has saved my family thousands of dollars in medical bills and vet bills.
For those who are curious the main ingredient in eggshells is calcium carbonate (the same brittle white stuff that chalk, limestone, cave stalactites, sea shells, coral, and pearls are made of). The shell itself is about 95% CaCO3 (which is also the main ingredient in sea shells). The remaining 5% includes calcium phosphate and magnesium carbonate and soluble and insoluble proteins.
I only pass this on for free because I have gained so much on this site I thought I would pay it forward.