Why does it annoy you, you have obviously had this dog a long time, unfortunately old age comes to us all, my last German Shepherd lived for 13.5 years and he used to wander during his last months, he was basically going a bit senile which is what could be happening to your dog, my dog also as time went on became slightly incontinent, not urine either, it's part of the aging process, if your vet thinks she is otherwise healthy then don't worry about her, just try to be patient.