More: Erna and Otis are both avalanche dogs at Bridger Bowl Ski Area in Bozeman, MT. Erna has been working there as a certified avi dog for almost a decade. She is now helping teach her little brother the ropes of being an avi dog and showing him how to become as good of a search dog as she is. If they aren’t searching or skiing they love swimming, frisbee, and chew bones.