How to toilet train a old puppy?
I have a 7 month dog from the shelter. She 's not been walked and doesn't know the concept of doing it outside. I walk her for a long time and she doesn't relieve herself. But the moment she is back in her own area (I keep her out with playpen in her own sleep area) she will do it. And she doesn't go to the tray which where she is supposed to do. I have put her pee on the tray to attract her but nothing works. And she will just pee when I go out of sight.
Please advise me how I can untrain what she learnt at the shelter.