I hope the new diet will help break up the struvite crystals soon. Are you giving him Hills S/D? I've had to give it to a few of my cats and the one good thing about that kibble is that they LOVE it! All my cats seem to want it and I have to make sure the ones that don't need it don't get into it.

Did the vet indicate what might be causing the kidney stones? I don't know much about them. Jimmy has a few kidney stones too.

Prayers that Scout will be feeling like her old self soon.