Urine pH is also naturally made more acidic by increasing the meat/fish-based protein percentage in food. Cats with chronic feline lower urinary tract disease caused by struvite uroliths are sometimes treated with a lifelong diet of prescription wet food as these special diets acidify urine which dissolve struvite. However ordinary wet food with high moisture content can be just as effective in many cases as struvite is soluble in dilute urine. Dry food of any sort should be avoided due to its low moisture content and possible dehydrating effects.