By some happenstance or another, it appears that I have stumbled on feed trained RES.
Our ¼ acre forage, “HSB grow-out, HSB/CNBG, now HSB/CNBG/RES pond has been a challenge from the start to feed train.

Introduction of stocking large 8-9 inch CNBG last fall kicked off HSB feeding and now a feeding frenzy when feeder goes off.
ALL female CNBG are now being removed.

I have had success with foam pellet flies with 2-3# HSB that intimidate the 10-12 inchers, so I went with Cecil’s AQMX pellet to sink below the surface, and catch the smaller HSB for transfer to main pond.
Larger HSB are being released to control BG spawn.

When I let the pellet sink even deeper the RES jump all over the AQMX fly.
Feed trained RES?