Why does my older female dog keep peeing in the house overnight?

There could be several reasons why your older female dog is peeing in the house overnight. It could be due to a medical issue such as a urinary tract infection or incontinence. It could also be a behavioral issue such as anxiety or lack of proper training. It is important to consult with a veterinarian to rule out any medical issues and to work with a professional trainer to address any behavioral issues.