A pet's age and activity level play significant roles in determining their ideal diet. Young pets, such as puppies and kittens, require diets high in protein to support growth and development. Likewise, active pets, like working dogs, need diets rich in fats for sustained energy. Conversely, senior pets may benefit from lower-calorie diets to prevent weight gain and accommodate their reduced activity levels. Consulting with a veterinarian ensures that a pet's diet is tailored to their specific life stage and activity level, promoting optimal health and well-being throughout their life.