I hope Megan gets better soon. My RB Springer, Freckles was diagnosed with "crystals" in her urine when she was about 5 years old. These crystals can form stones, so she was put on Science Diet C/D for the rest of her life (she lived until she was 12 years old). There were several times the vet suspected she might have a stone (she had many bladder infections the last two years of her life), and she was temporarily put on S/D, but then switched back to the C/D. The C/D is a hard dog food, the S/D is a canned dog food.

{{Hugs}} to you and Megan, I hope she is feeling better soon!