We grow out our pike by stocking alot of fathead minnows, golden shiners, and suckers. They are leftovers from our Bait division, and are free. If you want to do the same, you should consider having one of your small ponds devoted to forage for the pike, and transfer them to the pike when they need it. Buying fish for them to eat would be expensive. Seining would probably be the best method. Traps may work also.