Royal Canin Urinary S/O Moderate Calorie Wet Cat Food is a veterinary diet formulated to support cats with urinary tract issues. With its high moisture content, it helps increase urine dilution, which is particularly beneficial in cases of recurrent idiopathic cystitis—accounting for nearly 64% of feline lower urinary tract disease (FLUTD). The diet is proven to dissolve struvite uroliths effectively, while its low relative supersaturation (RSS) ensures an undersaturated urine environment that prevents the formation of both struvite and calcium oxalate crystals. By promoting urine dilution, it reduces the concentration of harmful minerals and supports regular bladder wash-out. Additionally, the S/O index creates an unfavorable environment for oxalate and struvite urolith formation, further protecting urinary health. This diet is recommended for cats with struvite uroliths (dissolution and recurrence management), calcium oxalate urolith recurrence, and feline idiopathic cystitis (FIC). 
NOT RECOMMENDED IN CASE OF: Chronic Kidney Disease, Heart disease, Concurrent use of urine-acidifying drugs Growth, gestation/lactation

Key Feature:

• IDIOPATHIC CYSTITIS: Thanks to the high moisture content of wet food, Urinary S/O Feline increases urine dilution. Since nearly 64% of cases of FLUTD are idiopathic cystitis, the wet diet should be preferred in cases of recurrent cystitis.

• STRUVITE DISSOLUTION: Urinary S/O Feline effectively dissolves struvite uroliths.

• LOW RSS: An undersaturated urine environment is one where crystals cannot proliferate. Thus, the urine is unfavourable to the development of struvite and calcium oxalate crystals.

• URINE DILUTION: Diluting urine decreases the urinary concentration of struvites and calcium oxalates. The larger urinary volume also ensures regular bladder wash-out.

• S/O INDEX: This product creates an unfavorable environment for the Creation of oxalate and struvite uroliths in the urine. 
  RECOMMENDED IN CASES FOR: 
  Struvite uroliths: dissolution and management of recurrence 
  Calcium oxalate uroliths: management of recurrence 
  Feline idiopathic cystitis (FIC)
  

Benefits:

• Increases urine dilution to help manage feline idiopathic cystitis (FIC)
• Low RSS supports an undersaturated urine environment, limiting crystal growth
• Effectively dissolves struvite uroliths and helps prevent recurrence