Puppies need different types of food than mature dogs, just as different breeds of dogs also require different types of dog food. If your dog seems like it has no energy, consider switching to another type of dog food. If you are unsure what kind to buy, you should consult your veterinarian.

Dog Food should be healthy and tasty.

If your dog does not like a certain type of dog food, do not force your dog to eat it. Instead, try to find another type of dog food that has all the vitamins that your dog needs, and your dog enjoys eating. Also, be aware that your dog's taste may change over time, and may not necessarily eat the same dog food all of its life. If it does not like its current dog food, then buy some other types of brands, and see which one is its favorite.