I feel that as long as you have your pond connected to "wild" water, you are going to have Mr. Bullhead gracing your waters.
I used to feel that LMB would keep bullheads in check, but I'm slowly coming away from that theory. Bruce does qualify his statement considering water clarity and the presence of weeds, but I wonder if the LMB don't prefer other fish to eat over the bullheads. So if you've got a good forage base, the pressure on the bullheads may not be enough.
I agree with taking a wait-&-see approach for now.
There is also a way to target bullheads when fishing (I read it somewhere). Take a piece of hot dog on a hook and cast the hotdog out and bring it back in a straight line slowly along the bottom of the pond; then repeat with a second cast so the path of the second cast creates and "X" shape with the path of the first cast. Obviosly, you have to cast from two different spots.
Then fish at the center of the "X" with hotdogs and see what comes up.
