Pretty nice problem to have. I'd say feed em and eat em until you start to see them with large heads and small bodies, then add your big BG. You might keep catching those beauties for years.

1.3 A, 80 yr old, renovation summer 2017, SW VA, 2000' elevation, Shallow, Spring Fed, Little Watershed, Stock Fall '17 with LMB, BG, RESF, FHM. Indigenous: Triploid Grass Carp, Israeli Carp, GSH