I have a 10-year-old Maltese mix weighing 10 kilograms. We started with the same company's food, specifically the struvite, after a recommendation from the veterinarian because stones were found in the urine during the ultrasound. After the stones dissolved, we continued with this food for neutered dogs. He really likes it, his bowel movements are normal, and we constantly order it. It is a prescription food, not commercial.