I've found that LMB learn to take feed fairly easily if bluegill are present and taking feed.

I've also noticed that smaller LMB sometimes school with bluegill, so those LMB clearly see the feed being taken by bluegill.


Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."