We have 2 chinese crested dogs, age 18 and 7 months that are hard to housebreak. If we keep them confined in a small area, they are fine, but if they are free in the house they are not to be trusted. We have confined them for weeks (of course letting them out to play and be with us in the room) but they just don't get it! We take them out a LOT, praise and treat for appropriate voiding, and still they make mistakes. Neither of them shows any signs when they need to go out. Any suggestions?