I had the same problem w/ my O's they wouldn't eat anything but shrimp and blood worms. They wouldn't even look at the pellets anymore! They were just being spoiled brats so I stopped feeding them the good stuff and soaked my pellets in a little garlic and after a week of not eating they came back around. Now they get a pretty good balance of each food, just have to teach them a little manners that's all. Lmao