I have 3 dogs. 1 of them is a new 2 year old rescue dog. She has been fine about potty training and has not had an accident until the house until recently we had a couple of poopie accidents in the early morning right before I get up. We have taught her to go in and out the doggie door, but since we open and close the back sliding door throughout the day so much she doesn't seem to think about the connection between the doggie door and when she has to go to the bathroom. Any suggestions?