With the pups being so active now, the pens’ original set up needed some reworking. I had placed one of the openings between the two pens so that I could open them when moms were away. They were constantly jumping over the opening and I didn’t want to see any of the pups get a leg or paw caught so I rearranged the pens. Now they have way more space than they could ever dream of having – Like a two bedroom condo with a long hall and private 1/2 bath! They are totally loving al of the running room!