My 1 1/2 year old daschund won't go outside anymore. She has always went out but now when I take her out, she runs right back to the door! I take her out on a lease all the time an have always been out there with her. Nothing ever happened. I don't know what is going on. She will, however, go out at night. I am clueless as to what happened. I have tried everything! Any suggestions?