Bob, all of the fish I've taken have been caught on two or three different pink flies. Their stomachs have been totally empty so I'm thinking they are chasing flies from attraction. Trout flies that are attractors might work well, don't you think? The pink flies in the water look like small squid, most of them anyway but I have caught several on a pink over white Clouser. I think they are striking out of reaction rather than hunger but I'm not sure.