How about letting the chickens pick what they need? Is anybody doing that, and is it even feasible? Since I like to feed mine a whole grain feed, I am going to offer the fish and alfalfa meal etc... as a separate option along with oyster shell and grit. I am curious to see if they will eat this separately. BTW I also have a 20% flock raiser available free choice. I read somewhere on the web about a guy who fed like that and it worked well for him.