My pup is a burrower - she insists on sleeping on soft surfaces under even softer blankets. Even when it's 100 degrees out, she wants to burrow. Before getting this bed, that meant her pushing blankets all over the floor in an effort to get under them.I set the bed up without the "arch" because she would definitely want as much blanket directly against her as possible. I wasn't sure she'd figure out how to get herself into it that way, but my concerns were for nothing. The instant I set it down, she was inside, contentedly snuggled in her little nest. The only problem is now she doesn't want to spend as much time on my lap! I knew she was just using me for my softness!