My LMB love trout fingerlings 3"-8" in size. Source of high protein and easy to swallow vs the spiny and more disc shaped CNBG. I began stocking trout in the Autumn as forage and they are quickly devoured.
Wow! Yer trout fingerlings must be a lot cheaper than they are here. The two species available at the fish farm I use are Browns and Brooks. Fingerlings 4 to 6 inches will cost $1.50/ea here. No way, I could afford to use them as LMB snacks.