German Shepherd dogs, as part of the canine family, eat standard dog food. These dogs are generally large and have high energy levels, so they need to eat more than smaller dogs.
While numerous brands and types of dog food are available on the market, adult German Shepherds need food that contains at least 18 percent protein and 5 percent fat in order to maintain a healthy lifestyle. Puppies and lactating mothers need about 22 percent protein and 8 percent fat content. Proper German Shepherd food should contain proteins derived from whole meats like fish or beef, as well as carbohydrates like rice, barley and oats.