Royal Canin Urinary S/O Dry Cat Food 2kg Dietary food Expiration date: January 13, 2027 *Shipped in a simple cardboard box. ◎ Urinary S/O for cats is a specially formulated dietary food intended for cats with lower urinary tract disease (struvite urolithiasis and calcium oxalate urolithiasis). Struvite / Nutritional balance adjusted to create slightly acidic urine, making it difficult for struvite to form. Urinary volume / Nutritional balance adjusted to maintain a healthy urinary volume. RSS / Nutritional balance adjusted to maintain a healthy urinary volume with low saturation of struvite and calcium oxalate in the urine. Magnesium restriction / Magnesium content, a component of struvite stones (magnesium ammonium phosphate), is restricted.