George,
Forage fish are certainly an option. My experience in north Texas, though, is that most ponds designated to be forage ponds wind up tainted with other species of fish, especially if there's any tie to another waterbody, be it a creek or another pond up or downstream.
With that in mind, I have several clients who manage for forage fish for their key fishing lakes, as an added insurance policy. Those folks tend to push the envelope of bass production, and use their forage ponds to supplement their bass ponds several times each year.
Seining is often not practical, but bluegill and fathead minnows readily come into traps and are fairly easy to catch, especially if trained to eat commercial fish food.
Small ponds have a multitude of purposes. Analyze your goals. Do you want another fishing pond? Want to grow huge catfish? Or big bream? Want a trout fishery in the winter, and something else in the summer? Want a quantity fishery? If so, stock your cull bass, with adult bluegill to support them. Or, buy some bass on feed, and raise a few big bass. Lots of things you can do, based on your overall vision, and the pond.
