He had stayed behind, making sure that no one was actually left behind while the others went to go explore. Maybe they found some food... He had wondered where they went, knowing only the direction. Plus, it seemed that no one else was stuck, so he started wandering away from the ship, taking little notice of the dogs that were staying behind. They were just wusses.
He soon had found them, arguing with some cats. "Hey guys, who's this...?" he asked, looking down at her, and sniffing, not at all liking that way she talked to them.