hunter mortenson rescued tally nine years ago and now the border collie mix and others have been trainedo the same as 30 trained rescuers in half the time. >> the dogs go through two seasons of intense zpratraining get a refresher course every year. avalanches are almost unheard of at breakin ridge. but just beyond that rope, out of bounds, you're at the mercy of mother nature. >> they must be unburied in 20 minutes. >> you'll be about five feet under. >> in a demonstration, i get a sense of the urgency. >> hopefully she comes soon. >> tammy got lost. are you ready? let's go. search! >> to find me, tally uses her nose of the it is thousands of times more powerful than a human's. >> yay! good job! >> but it is not all work. play time has purpose. it is a reward and strengthens the bond between these partners. >> the amazing thing that we ask is a complete trust. we're team them into situation that people don't usually go through. >> when man's best friend become as trapped skier's best hope. breckenridge, colorado. >> so pretty but so dangerous. >> thanks for watching. we leave with you i