From what I have read on this site, it definitely sounds like too many bass in the pond. If you stock fish for your bass to eat, you are throwing away money. I would suggest to go fishing and either keep and clean as many bass as you can, or toss them on the bank for the critters to eat. I will let somebody chime in with an approximate number, but I would say to remove anything you catch between 8-16 inches and trim the tail fin of anything under 8 inches so that the other fish can eat it easier. With a pond of 8-10 acres, you are probably looking at trying to get 400-500 bass. Once the bass get back in balance, the bluegill will replenish the forage base naturally. Others will chime in shortly and give you their input.