我幫你查了一下，他家網頁上有介紹，如果你知道是哪類結石就好選擇了
What are the differences between Nutram Urinary Care Female Cat Food and Nutram Urinary Care Male Cat Food? - The differences between the two urinary diets rely on the ideal pH range that each diet is designed to target. For example, Nutram Urinary Female Cat diet is a more acidic diet since female cats are more prone to developing STRUVITE crystals. Struvite crystals are more likely to form in alkaline scenarios, so we acidify the diet with certain ingredients such as DL Methionine. Nutram Urinary Male Cat diet, on the other hand, is designed to be more alkaline since OXALATE crystals, which are more likely to be found in male cats, are more likely to form in acidic scenarios, so we reduce the acidity of the diet. However, it is important to remember than not all cats are the same and some male cats can form Struvite stones and female cats can form Oxalate stones. Castrated cats may also experience changes in pH of their urine, so if not sure, consult with your veterinarian. One important point to remember is that our urinary diets are not therapeutic diets and they should not be used with the hopes of curing urinary problems. Our diets should only be used to alleviate the dietary factors that contribute to urinary stone formation
