[2DogOwner]

I have two puppies one is 9months the other 2 months. Before I got the second puppy the first female was house trained. The second pup the male was 100% trained within one week. But now the first pup is peeing in the living room only there. I block her from the area and she does great and uses her potty pad every time but the moment she gets into the living room she pees. I have scoured it with special products even though it is a sealed hard wood floor. I have put her bed in the spot I have played with her in the spot to no avail. I still gate them to one room when we go out. My questions are should I be gating both when I trust the other pup and any suggestion to stop the living room peeing incidents.