I have two shichons. One male, one female. Both over two years old. We have to be diligent about taking the dogs out to potty because they never let us know they have to go out. Up until a month ago being diligent worked okay. Both dogs sleep in bed with me and my wife. The dogs have held their potty overnight until we take them outside in the AM. However, for some reason the routine has changed. Before we wake up, the male has gone poop in the house a few times and the female has peed. We always take them outside last thing before going to bed at night. Two questions. What can we do to train them not to potty in the house and what can we do to train them to let us know they need to go potty?