The concept of war dogs is not lost to Rey. They've been prevalent throughout history for their keen sense of smell and hearing, making them rather convenient trackers and sentries. But they hardly make for effective front line defense in a combat zone.

"Guess our worlds have that in common. They're a valuable workforce as well as companionship. Never owned one personally, though."

Not that Rey wouldn't want to. She just isn't sure she'd trust herself; she barely knows what to do with herself with a cat and goldfish.