I agree with kno4te and tlindsey. Just wait a few more day before trying to feed again. Some fish are easy and will eat within minutes of being in a new tank. Some others are much harder and won't eat for days to weeks. Ya only really need to start worrying about it once it's gotten to around 3 weeks with no eating. Many different fish species can upwards of a month without eating in the wild so it's not too unnatural for a captive bred fish to refuse food for a week or 2 but after that point they should be hungry enough to try eating most anything ya put in as food.