If you're going to try feeding f/t i've found the best way is to let it defrost on top of the screen of the cage for a few hours and then heating it with a blow dryer for a few minutes to get it warm, again on the screen on top of the cage. I found that hades gets a lot more active and ready to feed from the smell. it got him out of his feeding slump. just make sure the mouse isn't frozen anymore