Feeding:

To get a healthy dog, never buy a puppy from a puppy mill, a pet store, or a breeder who doesn't provide health clearances

Recommended daily amount: 2 to 2 3/4 cups of a high-quality dog food daily, divided into two meals.

Dogs are individuals, just like people, and they don't all need the same amount of food.
It almost goes without saying that a highly active dog will need more than a couch potato dog.

The quality of dog food you buy also makes a difference — the better the dog food, the further it will go toward nourishing your dog and the less of it you'll need to shake into your dog's bowl.