You just have to stick with it, it will take it eventually but it doesnt just happen like flicking a switchI have tried frozen silver sides that’s the only thing frozen I’ve tried to feed him and he rejected those immediately he would attack them and bite them but would pretty much immediately let go of them , would you recommend any other frozen foods to try? I’ve seen people feed tilapia I’ve been thinking about trying that , I’ve also been thinking about getting a frozen mini monster pack from predatory fins to try it and feed that.