Please help my mother

I wonder if you can help me with some question concerning gall stones and gall bladder attacks. My mother who is 90 has gall stones, also had several painful attacks with hospitalization. For several reasons we are presently not considering an operation.
I am afraid to do flushes with her, but I am wondering if anyone has had good results with the mini cleanse where you take one Tbs. of olive oil plus juice of a lemon all blended with a cup of water, drunk first thing in morning? I have done this for several weeks before my first “real”flush , but I have never had gall bladder attacks. Could this process trigger an attack? Also, can salad oil trigger an attack?
What should she avoid? Is there a way of getting rid of stones other than operation, other than the traditional olive oil/grapefruit juice flushes?
Will gold coin grass tincture or chanca piedra break down stones AND ultimately expel them, or does one have to follow through with the traditional flushes, or else the broken down pieces will clump together again???
Any suggestions would be very helpful! Thank you in advance!