It is not possible to tell what kind of stones are in urine from an X-Ray. There may have been some crystals present
in a voided urine sample. Your dog may be deficient
in a substance normally found in urine called nephrocalcin. Nephrococalcin inhibits stone formation in most dogs.
From a holistic stand point, a totally grain and soy free diet may help, along with the following Chinese herbal formulas: Hydrangea and Eupatorium Formula, San Ren Tang, or Wei Ling Tang.