One thing I read about the shrimp is they eat detritus. Pond bottom muck.
I am pretty certain they eat 32% sinking catfish pellets also. I have trapped them with FHM in a cylindrical minnow trap. Pretty sure they were going in there to get the pellets I was using as bait for the minnows. If I am right about this, tossing in a few sinking feed pellets (higher protein would likely be better) regularly might give them something to eat while the natural food chain is lacking.
