All LMB do not spawn at the same time (especially in hatcheries) where conditions can be controlled. Could be a late hatch or what others said above. You should find out why. I think I would try to find about 10 - 12 6-8 inch LMB to stock now from a different hatchery.
My guess is you will have about 25% survival to year one if the fish were in good condition. On average when stocking 2 inch LMB into a pond with existing adult predators (other LMB) survival is between 2 and 10%. With BG only those %s would go up substantially due to gape size differences and your feeding the BG.
See habituation threads. Habituation of those 2 in LMB would have made a huge difference - survival maybe up to 85 %.
Last edited by ewest; 10/04/21 11:09 AM.