the yardstick through both sides of the cage to bar the carrier's front door.
open the cage door and lock the carrier door, using a plate or book to shield your hand.
remove the carrier from the cage (with the cat inside).
replace dirty newspaper, clean the litter box and provide fresh food and water.
put the carrier back in the cage.
slide the yardstick through both sides of the cage to bar the carrier door shut.
using a book or plate to shield your hand, unlock the carrier door.
remove the yardstick and use it to maneuver the carrier door open through the bars of the cage.
secure the carrier door to the side of the cage 