I'll +1 ewest's comment. The pond is contributing in important ways, even forage. I like your idea of trapping and moving some. cropping the forage pond will allow you grow more forage in it. It is important to take crops out to maximize the production.

I'd offer more if I knew more about your situation and ponds. Its unclear if you drain into the Mississippi or to the Ozark plateau for example. I don't know your goals or in what ways the situation is falling short, other than fewer FHM in main pond than what you would like to see.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers