Glad he ate something for you. If you notice him in feeding response going for the feeder fish, try dropping a thawed rodent pro pinky in with the fish and see if he'll accidentally hit the mouse and continue eating... they usually will. If you want to continue using the rodent pro mice, don't give up on them. Scent them with the more expensive mice, feeder fish, even another tree frog. Long term it will be worth it.