She can unlock doors

Yesterday I was doing some things and let Lydia wander around the house doing whatever she wanted. She came back to me holding my wedding ring (I had taken it off to play sports in the morning). I was surprised because I had put the ring in my room, and we put a lock (hook) on the door for the specific purpose of keeping Lydia out. When I went upstairs later that day, I found her port-a-potty next to our bedroom door. The extra eight inches gave her the height she needed to reach the hook and unlock the door.