Its going to be hard to get any forage established in a pond that is full of five year old bass.
Golden Shiners are great, but you may not have success with getting them established.
Crayfish would be a great addition too, but they might end up being a fast meal for your bass.
Gizzard shad would certainly be a good addition if you have a large population of those bass in the four and five pound class.
I'm no expert, but I might consider building a smaller pond solely for the purpose of growing golden shiners and crayfish. This way you can produce your own forage for stocking and you won't go broke feeding your bass shiners and crayfish LOL.
You'll need to also think about providing cover for your new forage if they will have any hope of surviving.
Just some random thoughts.
