I have also, as of tonight, had problems with the down command. Yesterday, Dottie wouldn't go down, but I thought it was because it was the end of the training session. But she wouldn't do it again tonight. I am going to not only use a new command, but reteach it like it was a new behavior. She is about 10 months old, and I'd not considered her beion a teenager! Great! How long do the teenage years last in doggie years?