I had a dog that did that.When I realized she really didn't have to go I just said no go back to bed. After ignoring her a few days she started to sleep through the night again. The only way to test it is to ignore her and see if she goes back to sleep.I have an 8 year old Pomeranian who wants to go out multiple times a night. I brought her to the vet and ruled out medical issues. It was determined that it is behavior related.
Any ideas on how to break this habit?