We just use the gummy fish they sell at Costco. I think they smell bad but ds6 loves them saying they are like eating candy. He won't have anything to do with the Coromega which I think tastes fine so you might just need to try a few things to see what they like (and you can take all the leftover stuff he won't take smile. So far, ds6 is having better days at school and it's just been a few weeks.