Just got back. My suggestion is to try to find some "slack" water where the current isn't as strong and get deep. I didn't have a whole lot of success, myself. But the ones I did catch were strong fighting!
I read somewhere that those were bred specifically to be easy targets for eagles. It was some website dealing with streams in the Cherokee reservation in NC...
Indeed I have been sprayed with police grade pepper spray for training at work and I can tell you ...IT SUCKS WORSE THAN ANYTHING IN THE WORLD It's worse than teargas. It should do wonders on dogs.
Black or Olive soft hackle flies size 16. Cast across the current and let it swing. Give it a twitch once and a while and when it "swings" at the end of the drift, hang on... Twitch it back to you and then lather, rinse and repeat!
Where I am glad that they have discovered a use for them, I'd be happy if they'd have kept the bloody things "home" in the first place...(Yes, I know how they got there )