The trout will eat fathead minnows, I believe, but that may not be a problem towards getting the fatheads to be in abundance for the YP and SMB stockings the following year. I think that depends on how many trout you stock.

Trout do eat bugs and such, but I still think they might need more forage base to thrive.

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."