If she's eating the dry, then let her have all she wants!
You're so brave to let her have free roam...when mine were puppies, it seemed like they would hold it & go anywhere when they were let out of their ex-pen apt. They also never went when I was there, but if I leave the room for a sec & come back, there were poopies everywhere! Like they're saying, 'yay she gone, let's have a poop party!' loll