Birddog, I flyfish my trout pond lots and I found the same issue with changing fly patterns. Lately I have been using a full sink line during the day with scud or leech patterns. Evenings I use floating line with backswimmer imitations, last night the hatch was on and they were nailing it on the surface. Water temps are 39 right now, but as you say they are feeding very agressively. Times running out for flyfishing here, snow forecasted for tonight.
