What Does It Mean?

What does "Grass Fed, Grass Finished Beef" mean? 

-Grass Fed: The cows were strictly eating grass, no corn, hormones, grains or other food substitutes were given to the cows.
-Grass Finished: The cows only ate grass and were not given corn, hormones, grains or any other substitutes to help fatten them up prior to processing. 

Many meats at the store have labels that claim the meat was "grass fed" but notice that it doesn't mention how they were "finished." This is likely because they were grass fed but not grass finished. The Double S Ranch has grass fed, grass finished beef.