I stocked my pond in February(been feeding since late Feb) and I have yet to see a single RES at the feeder or around the dock where I hand feed. I have CNBG by the hundreds all lineup waiting, so I have a chance to look pretty good. Is this unusual? I stocked 500 RES.

Yes that is normal. RES often do not feed at the surface but will eat pellets that sink.

The ONLY time that I see the RES in my pond is when they are spawning. The other 10 months of the year you wouldn't think I had any in the pond.