We just adopted an 18 month old black lab from the humane society this past weekend. They told us she was potty trained. She did fine the first two days, no accidents or anything. Yesterday and today, she has had two accidents, one each day. The first one was probably because it had been a while since she'd been out. But the second one, she was playing in the living room with the cat, after she had just been out. She goes outside when we take her out with no problems. I can't tell if she's also going in the room where she's staying during the day and if it just dries before I can find it. We both work all day and are usually gone for 4-6 hours. Is she potty trained and this is just because it's a new house? Or does she need to be re-trained?