I take the f/t mouse out of the freezer the night before and wrap it in tin foil. then I put it into the refrigerator to thaw. About one hour before feeding I put it (the tin foil bundle) on top of the screen under the heat lamp. Boy, Fluffy perks up right away and he starts looking for the mouse. By the time I open the door and present the mouse on my tongs he jumps it. Takes no more than 5 seconds.