Blackys like anything free;) they are opportunist, but if they are not familiar with fish they may not eat it, I like to use bacon fat, rub it all over everything, marshmallows work well also and of course like mentioned donuts, old pastry, meats scrapes, jello, Raw Molasses is really good as well, pour it all over the bait and everything, the bears get it on the paws and track it all over the woods for other bears to follow;) good luck, hunt safe. Aim small hit small. RAMbo.