Prayers for beautiful Robin! She sure lucked out when she came to live with you...her previous owner might not have noticed anything, although from what I remember, he was not at all unkind.

How odd that nothing dissolves them...though being in the ureter, they don't get soaked in the stuff that would work.

PT Prayers for the surgery, and that Robin will come through with flying colours!

I don't know if this well help any meanwhile, but when Oscar had a few crystals and a UTI several years ago, the vet was okay with me adding about 1/5 of a capsule of cranberry powder to plain unflavoured yogurt, once a day for about a month. Kept the acidity up.

PT Prayers for beautiful Robin. Wonderful that she is feeling great and even getting a little brave!