Search-and-Rescue Dog Sniffs Out Lung Cancer, Woman Says

Anne Wills and her oncologist believe her Shepherd-Lab mix detected her lung cancer early enough to possibly save her life.
2:08 | 12/18/15

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Transcript for Search-and-Rescue Dog Sniffs Out Lung Cancer, Woman Says
Like most all dogs waiting loves to play. But beating half year old shepherd lab mix has a date jobs she takes very seriously. In her almost eight years of work game. She herself. Has gotten Obama's 2000 animals have thanked. And a leader in wields one dogs finding adults. Derek canine search and rescue team that's dispatched to find missing pets and people to save a lot of lives like this never thought she saved mine. I often say that Heidi has the equivalent to Ph.D.s doctor answer cold state Agnes hospital is wheels on colleges in this case. A dog diagnose the cancer. Before the doctors did you heard that right Heidi detected growth cancer not having. Any symptoms whatsoever. I did everything wrong that is until February when Katie started acting very distressed she pulled it rules arm over and over again she's. Progressively getting more and more aggressive with that behavior and then she started taking as. And varying in my chest. And sniffing very very hard after a vet determined nothing was wrong with Heidi both decided to get checked out herself told the doctors the story. He segment our cat scans and the next morning was calling me telling me that he sees the responsible looks like cancer. And that was right where Heidi was smelling in my chest that early detection very likely cede her light. When they come when they developed symptoms which is usually when we first see them. They typically already have. Advanced stage lung cancer. That is incurable doctor Coles says what Heidi did isn't usual but he isn't unheard I think it's a testimony to mrs. wells. Devotion to her dog. The dogs devotion to her the high training that Heidi has him using its special. Super sensitive nose to. Track people lost pets. Detect narcotics and in this case to find the presence of a lung cancer. Ellen better everyday wills cancer is now in remission and while not everyone has a high eighty. Walls hold severe story helps others. Listen to your pet in if your dog. Not say every dog and every time they smell you do it something bad but. Yes you see something like mine situation. It needs to stop and think and I got to the doctor.

This transcript has been automatically generated and may not be 100% accurate.

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