I put the mouse in, then go get the snake and the snake's water bowl, weigh the snake, put it in the container, wash the water bowl and replace it, move on to the next snake. EXCEPT I put the Florida Kings, Jake, Janine and Jewel, and Noah the Boa in their bins before handling the mice at all. The kings will bite for sure if I smell mousey, and Noah bit me once. Choco- Cali King and Inez- Nelson's Milk, couldn't care less.