Purina Pro Plan Veterinary Diets 1Count Urinary Canine Formula Adult Dog Food, 25 lb Purina Pro Plan Veterinary Diets UR Urinary Ox/St has been specifically formulated to promote urinary tract health. It promotes a urinary environment unfavorable for developing struvite and calcium oxalate crystals and a healthy urine acidity level. Designed for dogs with lower urinary tract disease, sterile struvite stones, a history of calcium oxalate stones, or idiopathic cystitis. This powerful formula provides complete and balanced nutrition for adult dogs. Highly palatable: tasty for every day, long-term feeding