The Owyhee starts in the Nevada mountains, I'm pretty sure.
The water temp isn't particularly cold, but trout do live there as well - so not so warm either.
I caught one very nice trout, also on the Panther Martin spinner. Maybe 13-14" long and very bright.
The cats will eat anything they can catch, but mostly crappie and bass fry, I would imagine.
There's frogs and tadpoles and crayfish as well.
We had a fish fry one night and they were delicious. Dipped in egg and panko crumbs and quick fried in oil.
Yesterday we were drifting the Osage River for blues and the surface temp was 72. The reason that I asked about the forage fish where you were fishing is where we were fishing the bluecats main forage and best bait is shad... a very oily fish, cats fed on crappie and bass would probably be even better. I like to let my fillets soak in a bucket of cool water for a couple of hours... a lot of oil floats to the top and can be poured off before freezing.
