Once they're a safe distance and the dead are far behind, Rey catches up to notice the animal limping along.

"Hey. You okay?" A beat, and she pauses. Was she really expecting an answer? She shakes her head at herself. "Ugh, never mind. Of course you're not."

This thing looks badly hurt. Rey's no veterinarian, though she doubts anyone would know the first thing about... whatever the hell kind of animal this is. She suspects that anyone else would be just as clueless as she is about how to properly treat it. At least Rey has some first aid skills to get by on the battlefield; she may be more durable than most, but she still gets hurt.

The doors open, and she steps inside, hoping that the animal takes the hint to follow. Inside equals safe.