Which food suits a dog with urate or cystine stones?

Urate stones call for a low-purine, alkalinising diet, often with allopurinol and very dilute urine. Cystine stones need reduced sulphur amino acids (methionine, cystine), alkalinisation and dilution, sometimes cystine-binding agents. Both types, often genetic, are managed closely with the vet (UC Davis; Merck Veterinary Manual). Expert deep dive ### How do you manage urate stones? Urate, common in the Dalmatian and in dogs with a liver shunt, is managed with a low-purine diet (offal is the richest source; plant and dairy proteins the lowest), urine alkalinisation and strong dilution. Allopurinol, a xanthine oxidase inhibitor, lowers uric acid production. Any associated infection is treated (UC Davis; dvm360). Medical dissolution takes around eight to twelve weeks on average and succeeds in roughly one dog in three. ### How do you manage cystine stones? Cystinuria is an inherited defect in renal reabsorption of amino acids. Prevention aims to cut methionine and cystine intake, alkalinise the urine and dilute it; cystine-binding agents (such as tiopronin) are sometimes prescribed. Surprising fact: low-purine regimens based on egg or fresh cheese, even balanced vegetarian ones, are used in dogs for these stones, where they would be unsuitable for the obligate-carnivore cat. Diagnosis, stone analysis and protocol belong to the vet, often with genetic screening. Comparison table | Stone | Dietary strategy | Common drug | |---|---|---| | Urate | low-purine, alkalinise, dilute | allopurinol | | Cystine | reduce methionine/cystine, alkalinise, dilute | tiopronin | | Common | high water intake, dilute urine | per case | Petipedia's take Petipedia presents urate and cystine as often-genetic stones, managed by a specific diet and dedicated drugs, under close veterinary guidance.