My advice would be to keep offering food items until she acts disinterested, and to feed her every day since she is a juvenile and in a stage of rapid development. They will stop trying to eat when they are full. Usually, I dump about 40 or 50 dusted fruit flies in with my two toadlets, and after about 15 minutes, they're mostly gone, or all gone. If they're all gone, I'll give the toads maybe 10 more at a time until they start ignoring the food, and then dump the few leftovers into their tank for later consumption.