Your T could just need to settle into its new home before it gets interested in eating. It also might not recognize the worm as food, or it may not be hungry. Not all G. roseas eat a lot. I have six and out of all of them I've only got one with what I would call a decent appetite. With my two big girls and my mature male, one cricket every two weeks is about it. My smaller juvie eats well, the larger one in in premoult, and my sling goes on fasts. They are very individual. Take the worm out and try again in a week, if it is turned down again, try a cricket.