Which food helps prevent calcium oxalate crystals in a cat?

Oxalate does not dissolve: prevention aims to cut recurrence after stone removal. It rests on dilute, less acidic urine, high water intake, and a veterinary diet moderating the precursors (balanced dietary calcium and oxalate, no over-acidification). Urinalysis follow-up guides prevention under veterinary control (Today's Veterinary Practice). Expert deep dive ### What does oxalate prevention rest on? As calcium oxalate is insoluble, no diet dissolves it: the only dietary action is preventive. The aim is dilute urine at a less acidic pH, which lowers oxalate supersaturation. The diet avoids over-acidification and balances calcium and oxalate intake, without restricting them so far that the ration is unbalanced (Today's Veterinary Practice). Hydration is central: the more dilute the urine, the less oxalate supersaturates. ### What role does the food's composition play? Work published in 2024 shows that food moisture and the starch-to-protein ratio influence water balance and urine supersaturation; a more protein-rich ratio lowered urinary oxalate. Surprising fact: composition matters as much as pH, so two foods at the same target pH may not be equivalent on oxalate risk (PMC, 2024). The prevention diet is kept long term, with regular urine and imaging follow-up to catch early recurrence. Comparison table | Prevention lever | Aim | Note | |---|---|---| | Dilute the urine | lower supersaturation | wet food, fountains | | Less acidic pH | disfavour oxalate | avoid over-acidification | | Balance calcium/oxalate | limit precursors | without unbalancing the ration | | Urine follow-up | catch recurrence | regular analyses | Petipedia's take Petipedia frames oxalate management as purely preventive, centred on dilution and a suitable pH, under veterinary follow-up after stone removal.