idk what its diet was b4 but she will taste the ssticks and pellets and spit them right out..it might have been on flake i have no clue but i need her on pellets>> my oscars r pretty mellow fish they only want to challenge eachother dont really pay her any mind my jag was pretty mean to her at 1st but then the n.livingstonii got comfortable and started defending itself now they just swim past eachother