In cats, struvite can form without an infection and a special diet is recommended to reduce the risk of future episodes. Most diets designed to dissolve struvite can also be used for stone prevention. Struvite crystals in cat urine, especially in fresh samples, suggests that the cat may be at higher risk for stone development, even if there is no infection present.
So it's sure okay to give your cat special diets to prevent struvite stones
