Miranda and I have a gate on the bathroom that is off our bedroom. Roo's crate is also located in this bathroom which has a ceramic floor. Roo's food dish and water bowl live in this area as well. When we both leave the house, Bonzo our boston goes into her crate that is in the bedroom and Roo's dog bed is put in the bathroom along with plenty of toys to keep him busy. We started giving both dogs a couple of Chicken Chip treats when we go to leave and kennel them. This is worked out well for us because when we are getting ready to go, both dogs get walked, and as we come in the door we say kennel. They both run to their respective kennels and wait patiently for their treats.
They have both gotten into the habit of going where they are supposed to because of this practice.
Jason