Got lucky with this group and they took to hikari carnivore right out of the gate then were switched to the cheaper hikari gold afterwards. Never offered them live food. Ironic as ive owned prob. 50ct reg. or royal CK's over the years and not one of them would ever eat cut fish or pellets for me, only feeders. Id imagine them being farm raised/c.b. has alot to do with it. Im very thankful i held out the 1st cple weeks and refrained from any live foods. They started to chow down lights out and became more bold as time went on feeding during lights on. Nowadays they beg for food when they see me.