There are many factors to consider when choosing the right brand of dog food for your dog. Your dog's age, size, activity level, health, and preferences all play a role in your dog food selection.
For puppies, choose dog food that contains appropriate amounts of protein, fat and calcium. For adult dogs, consider choosing a suitable staple food for them. For older dogs, choose high-protein, low-fat dog food to help maintain weight and health. Also, pay attention to your dog’s preferences. This should be avoided if your dog is allergic to a certain food. You should also pay attention to your dog's health; if your dog suffers from a certain disease, you may need to use dog food specifically designed for that disease. Finally, you can also consult a veterinarian or other professional for more advice on dog food choices.