Thanks for the responses!

The first couple I introduced with the light on and they were hit the minute they were released into the water (certainly wasn't expecting that but the the brightest of moves looking back). The later ones I introduced with the lights off. I did turn the lights back on within a few minutes, though. Perhaps they were not well hidden yet. The initial ones were also the larger ones (I got scared with the later ones so went cheap, thus small).

She is probably just over two inches (fairly big, I think). She should be getting plenty of food. I know that different varieties of percs can be more or less aggressive. It just surprises me with the B&W. As mentioned above, the fact she even looks twice at the shrimp is surprising to me.

I would hate to stress her, or the tank, by first catching and then pulling her out. I may try the idea of extra feeding combined with introducing at night about an hour after lights out. There should be plenty of hiding places (over 60lbs of rock) if the shrimp will just get in them and stay there. That may be my best opportunity.

Regards,
Greg