She is a flame.
You can just get a few crickets to feed her until the CGD comes. If you don't want to do crickets you can mash up some fresh fruit and see if she will eat that. Most cresteds especially like bananas, strawberries, mangoes, peaches, and watermelon, but NO citrus fruits (they have too much citric acid). You could just mash up some banana to start if you don't want to buy a bunch of fruit since the CGD is coming soon. A day or two of no food wouldn't be too big of a deal since she is an adult and adjusting to a new home (during which time they may not eat much), but I wouldn't go more than that.