You need to post this as a seprat topic!! But being that I am the most intrested in catfish as any one, I am here to tell you I have search high and low for flatheads and have not located a single person who sales them. NO ONE!! I have found that your mature Blue cat are almost just a predatious as Flatheads, they fight harder at the end of a line as well.
Blues or maybe even large channels will prey on crappie, but thats really only half the story with crappie. Usually you do not have enough forage to sustain them.