I have a 3 month old Border Terrier Bitch. She seems to prefer going to the loo indoors rather than out. On a walk she rarely goes just waits till she gets home! i have put down training pads by door but she wont use them (only to play with) i take her out side about every 45 mins as i did earlier walked around for about 10 minutes she did two wee's then pooed on the floor when she came back in. What am i doing wrong!!!!!