Since dogs need the extra calories as they continue to grow into their adult size, then this means the German shepherd should eat puppy food until they’ve reached at least 18 months of age.

At age 9, the webmd.com chart said, their estimated age in "human years" is as follows: • 52 years for small dogs weighing less than 20 pounds. • 56 years for medium-sized dogs weighing 21 ...