Todd,
I did stock fatheads...that I bought from you earlier when I purchased HSB. It's the Gambusia that the GG's are feeding on...and without them there might be no feeding. I can see it clearly on the surface. There just is no doubt that it is happening. I have an artificial feeder, but the cold temps preclude/limit the feeding...but the feeding on the Gambusia even during the coldest temps was clearly evident and active and unabated.
I don't understand what that has to do with promoting fish. Most of us try very hard to insure adequate forage available to our predators at the time of stocking so the predators will grow. The Gambusia to a GG seem to be like a fathead is to a HSB/LMB. What is wrong with providing forage that otherwise would not be there to promote growth in a predator? I must be missing something.