Royal Canin creates dozens of recipes based on dog breed, age, and size. It also creates recipes that target specific ailments. If you have a purebred dog, we recommend checking to see if Royal Canin has a formula for them. If not, consider your dog’s age and size when choosing a recipe. If your dog has a specific issue such as skin concerns or a sensitive stomach, you’ll want to consult your veterinarian to see if a more advanced formula is required.