I witnessed it at Rim Shoals on the white.
Me and Gary Flippin were coming up from the bottom of the CnR area when we saw a commotion near the bank.
We motored over and watched several large browns corralling a bunch of stocker rainbows against the bank.
Every so often one of the browns would charge in and pick off one the stockers. When it charged in some of the rainbows were so freaked out they jumped out of the water onto the bank to get away. Gary told me he sees that all the time after the stocking truck has been there.
Pete