That is a nice bass in your pic, but I don't think that one would be eating your largest BG.

Here is a link to an old thread on your topic.

Pond Boss Thread for Trophy BG

In that thread they liked having the LMB eating pellets. I think if you can throw the largest pellets, then your biggest bass will be gaining weight on pellets rather than on your big BG.

From my readings, it appears that every trophy BG pond also has big bass. I think the reason is that the biggest hurdle to you growing 1#+ BG is competition from all of the other BG that are just a bit smaller than that size. You must have big bass eating lots of the next couple of sizes below your trophy size BG to allow your biggest BG to max out.

[I am NOT an expert, but our actual experts on the forum have not come up with a "perfect" formula. Therefore, I think that means not too many medium and big bass AND not too few medium and big bass.]

If you raise enough healthy BG, then the largest bass cannot knock off all of them.

I have also included a link to a good article on some other ways to improve the size of your largest BGs.

Lusk Article - Growing Giant Bluegills