For a while there we had a problem with Corona sneeking off and peeing behind the couch. A close friend taugh me a trick that helped her when training her dog. If you blow up balloons and put them behind the couch, most dogs, and even cats are afriad and won't go back there. We tired this and it worked great. Instead of sneaking off behind the couch Corona now runs to the back door!!! Just thought I'd share this little trick! It may not be considered a reasoable way of training a dog, but it worked for us! :0)