I just wanted to let those who are interested in indoor training your lil yorkie that i highly recommend the wizdog. i bought one for poopy and he is practically potty trained. we also recently went to california on a trip and brought the wizdog along with us. he actually remembered to go inside the wizdog. we put him in his crate at night and the first thing in the morning we open it and tell him to go tinkle and would walk over to it and do his thing. we loved it a lot because i hate to go outside at night or in the morning. so it worked out.