I put all mine on paper towel. Left over night.. Pulled out in the am. Ive had mice pinkies an med rats be fine. But a few mice have blown up like a baloon and made me near puke. After 8 hours. All depends how fast they were frozen after death. If read some bps like them after they have been thawed twice. More of a wild smell i guess. And ive also read that naturally bps are oportunity feeders an will eat dead prey. Not sure the validity of that though.