I supplement with antioxidants because my breed is prone to oxidation problems under heavy work conditions.  I'm switching back this week to all fresh foods (yay!) and my totally raw guys get muscle meat, organs (including brain), tripe, whole fowl and rabbit, odd parts such as feet and heads, fish, and of course raw meaty bones - plus the antioxidant supplement for Ben, who is in the work rotation. 

The other BCs are "supplemented" with a cereal/ground meat mixture similiar to Satin Balls to cut back on the expense of trying to meet their energy requirements with just meat.  [:D]