I've been catching and trapping the brookies and rainbows in the pond and they've grown well, but I have yet to catch or trap a single BRNT, I put in 50 in the spring that were 4".
How are you trapping them? The browns may be using a different habitat than the other species. I've seen lakes where the rainbows and brooks were bottom oriented and the browns suspended off the bottom. On the other hand I've seen lakes where the rainbows suspended and most of the browns were bottom oriented.
As far as catching them via hook and line vs. brooks and bows they can very hard to catch. When I harvest browns from my trout pond via hook and line there are always about 10 maybe 15 that can only be removed by draining the pond.
