Two days ago I gave my young 6" male Dovii feeders for the first time. He was already aggresive but kind of shy, but after eating feeders for the first time his whole attitude has changed. He is now attacking my Plecos, and he never attacked my Plecos before. Has any of you ever seen a fish get his first taste of live food and go from a shy but aggresive fish to a fire breather?

if it were in a community tank then everything would be dead and demolished