I agree with Dave...maybe cut back on the catfish a bit. 50-100 catfish in a .75 acre pond should be plenty, and if you have them on feed, that would definitely help keep them away from your small bass when you stock them.
Another thought to consider is the green sunfish that are currently in the pond...they are pretty aggresive and a "palm-sized" one (in my opinion) would definietly be capable of eating a 3" bass.
