Grass-Fed vs Grass-Finished

Grass-fed beef comes from cattle that were started on a grass diet but have either received supplemental grain feed or are finished on a fully grain-based diet. Many grass-fed cows spend the last few months of their lives eating grain in feedlots to help them quickly gain weight before going to slaughter or are given the option to eat supplemental feed on pasture during winter months, when grass is not as readily available.  Cattle are not required to have a FULL grass-fed diet in order to get the grass-fed label on your beef’s packaging. Moreover, grass-fed cows are not necessarily pasture-raised.

Grass-finished beef comes from cattle that ate only grass and forage all it’s life.  No grain is EVER fed to grass-finished animals.

Grass-finished beef may be marketed as grass-fed beef, but not vice versa.

Sources:
http://www.verdefarms.com/what-is-the-difference-between-grass-fed-and-grass-finished-beef/
https://www.beefboard.org/news/files/factsheets/grass-finished-beef.pdf
http://www.bradysbeef.com/grass-finished-beef.html