My 13 week old westie was getting up to the toilet about 3-4 times during the night for the first couple of weeks. I would just take her out to the toilet, didn't give her any eye contact and put her back to bed. The past week she has been sleeping from about 10.30pm to 7.30am without having to go out to the toilet. In fact, the other morning my hubby had to wake her up as she didn't want to move. My advice would be just remember when you take them out at night don't give any eye contact at all, just toilet and bed and they will soon learn.