Believe it or not I knew a couple that ran a trout farm in Wisconsin that brought some in and threw pellets at them along with trout in another tank. They said they got them to feed on pellets as good as the trout.
I got a few hundred of them (3 to 4 inches) but unfortunately most of them died later due to fungal issues. They were hauled in the same tanks as 1 to 2 lb. trout (probably got all beat up by the trout slushing around), and one of the trout club people that helped scoop them out did a dumb amateur thing: He filled a net with them crushing and injuring most of them. It was no wonder they had fungal issues.
I did have some feeding in a cage though.
