4Corners - For your picky BG to learn to eat moistened Endurance, have you tried squeezing the moist pellets so they sink? Or try this. With properly moistened high 40%+ protein fish food try rolling the pellets into long worm shaped pieces, maybe the diameter of a pencil and 1"-1.5" - 2" long. This should help encourage picky fish to eat moist pellets. If the fish accept the worm shapes gradually reshape them into rounder pieces. When the fish are eating these rounder pieces it is an easy conversion to drier and drier pellets that float.
FYI - my 11"-12" yellow perch will eat 22mm dry pellets.