With Madison backing toward the door in paranoia, rather than sprinting on her freshly healed leg, it is easy for Conner to catch up with her and Joe; all while maintaining his supernatural shroud. Their minds simply do not register the dogs milling round an empty space that follows close, and neither to the dogs themselves realize they're leaving the gap.
If he wishes, the Reeve could possibly overtake them, and enter the open portal first. Either way, they will move straight to the building and shut themselves inside unless interrupted.
There are no more dogs of threatening size outside in the vicinity; the ones that remained followed Blake and Charles out of the scene