I took in the mother dog and her two pups when puppies a day old. And I used puppy pads to train the puppies. And then at 6wks I also started putting the puppies out to do their business with my two older dogs and their mother. This went well. The sister pup went to her new home last week and is said to be doing very well with going outside and on pads if inside. Mom dog went back to my son 2 days later. My puppy who was the best of all at using pads and going outside is peeing everywhere now since her mother went back to her home. What happened? I am not able to keep a dog who pee's on things. I'm with puppy and my two other dogs 24/7. please help!