Miniver appears quickly and lets himself in. He loops Jack's leash around the doorknob to keep him from destroying anything (he's a well-behaved critter, but still young and curious and large) and goes to crouch next to Navi.
"Oh hey, jeeze... You really did a number on that, huh? Okay, relax, sweetie, I gotcha..."
He may not be overwhelmingly useful at all times, but he knows how to handle a few things, and this is one of them. He goes to the sink for a towel and warm water and starts cleaning up the blood on her wings and the floor.