Meet the cancer-sniffing dogs | CNN

CNN values your feedback

1. How relevant is this ad to you?
2. Did you encounter any technical issues?
Thank You!
Your effort and contribution in providing this feedback is much appreciated.
Close
Ad Feedback
Health
Life, But Better
Fitness
Food
Sleep
Mindfulness
Relationships
More
Life, But Better Fitness Food Sleep Mindfulness Relationships
Watch Listen Live TV
My Account
  • Settings
  • Newsletters
  • Topics you follow
  • Sign out
Your CNN account Sign in to your CNN account

My Account
  • Settings
  • Newsletters
  • Topics you follow
  • Sign out
Your CNN account Sign in to your CNN account

Live TV Listen Watch
Edition
US
International
Arabic
Español
Edition
  • US
  • International
  • Arabic
  • Español

Life, But Better
Fitness
Food
Sleep
Mindfulness
Relationships

Follow CNN
Download the CNN App

  • World
    • Africa
    • Americas
    • Asia
    • Australia
    • China
    • Europe
    • India
    • Middle East
    • United Kingdom
  • US Politics
    • Elections 2026
    • Trump
    • Facts First
    • CNN Polls
    • Redistricting Tracker
    • Epstein Files
  • Business
    • Tech
    • Media
    • Calculators
    • Videos
  • Markets
    • Pre-markets
    • After-Hours
    • Fear & Greed
    • Investing
    • Markets Now
    • Nightcap
  • Health
    • Life, But Better
    • Fitness
    • Food
    • Sleep
    • Mindfulness
    • Relationships
  • Entertainment
    • Movies
    • Television
    • Celebrity
  • Tech
    • Innovate
  • Style
    • Arts
    • Design
    • Fashion
    • Architecture
    • Luxury
    • Beauty
    • Video
  • Travel
    • Destinations
    • Food & Drink
    • Stay
    • News
    • Videos
  • Sports
    • Football
    • Tennis
    • Golf
    • Motorsport
    • US Sports
    • Olympics
  • Science
    • Space
    • Life
    • Unearthed
  • Climate
    • Solutions
    • Weather
  • Weather
    • Video
    • Climate
  • World Cup 2026
  • Ukraine-Russia War
  • Israel-Hamas War
  • Features
    • As Equals
    • Call to Earth
    • Freedom Project
    • Impact Your World
    • Inside Africa
    • CNN Heroes
  • Watch
    • Live TV
    • Featured
    • CNN Fast
    • Shows A-Z
    • CNN 10
    • CNN TV Schedule
  • Listen
    • All There Is with Anderson Cooper
    • Chasing Life with Dr. Sanjay Gupta
    • The Assignment with Audie Cornish
    • Terms of Service with Clare Duffy
    • CNN 5 Things
    • All CNN Podcasts
  • Games
    • Daily Crossword
    • Jumble Crossword
    • Photo Shuffle
    • Sudoblock
    • Sudoku
    • 5 Things Quiz
  • About CNN
    • Photos
    • Investigations
    • CNN Profiles
    • CNN Leadership
    • CNN Newsletters
    • Work for CNN

Download the CNN App
Health

Meet the dogs that can sniff out cancer better than some lab tests

Updated 7:54 AM EST, Fri November 20, 2015
Link Copied!
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver.  Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver. Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
John Bonifield/CNN
Claire Guest is the CEO of Medical Detection Dogs, a company that trains dogs to sniff out cancer. Her fox red Labrador, Daisy, caught her breast cancer six years ago when she was 45. "She kept staring at me and lunging into my chest. It led me to find a lump," Guest remembers.
Claire Guest is the CEO of Medical Detection Dogs, a company that trains dogs to sniff out cancer. Her fox red Labrador, Daisy, caught her breast cancer six years ago when she was 45. "She kept staring at me and lunging into my chest. It led me to find a lump," Guest remembers.
John Bonifield/CNN
Ulric, a cross between a Labrador and a golden retriever, is a bit of a water baby. He loves to get into troughs of water that are left out for cattle and will retrieve his ball from the bottom of a stream.
Ulric, a cross between a Labrador and a golden retriever, is a bit of a water baby. He loves to get into troughs of water that are left out for cattle and will retrieve his ball from the bottom of a stream.
John Bonifield/CNN
Lucy, a cross between a Labrador retriever and an Irish water spaniel, failed miserably at guide dog school. But she has performed astonishingly well at sniffing out bladder, kidney and prostate cancer. She detects cancer correctly more than 95% of the time. That's better than some lab tests used to diagnose cancer.
Lucy, a cross between a Labrador retriever and an Irish water spaniel, failed miserably at guide dog school. But she has performed astonishingly well at sniffing out bladder, kidney and prostate cancer. She detects cancer correctly more than 95% of the time. That's better than some lab tests used to diagnose cancer.
Courtesy of Alex Bieraugel
Karry, who is one-quarter curly-coated retriever and three-quarters Labrador, was too excitable to be a medical assistance dog for diabetics, so all that energy is now focused on problem solving. She's learning to sniff out prostate cancer.
Karry, who is one-quarter curly-coated retriever and three-quarters Labrador, was too excitable to be a medical assistance dog for diabetics, so all that energy is now focused on problem solving. She's learning to sniff out prostate cancer.
John Bonifield/CNN
Fifteen-month-old Florin is young, but she's already showing promise detecting cancer. She's a fox red Labrador, just like her aunt, Daisy. She was bred with the hope that Daisy's cancer-sniffing DNA would run in the family. Behind her, Midas, a white-haired Hungarian vizsla, was initially trained to detect bed bugs. Now, she sniffs out cancer. Midas is a diva. She sits on Guest's chair when she isn't there, and bosses other dogs around.
Fifteen-month-old Florin is young, but she's already showing promise detecting cancer. She's a fox red Labrador, just like her aunt, Daisy. She was bred with the hope that Daisy's cancer-sniffing DNA would run in the family. Behind her, Midas, a white-haired Hungarian vizsla, was initially trained to detect bed bugs. Now, she sniffs out cancer. Midas is a diva. She sits on Guest's chair when she isn't there, and bosses other dogs around.
Courtesy of Alex Bieraugel
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver.  Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver. Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
John Bonifield/CNN
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver.  Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
Kiwi, a yellow Labrador, is a former guide dog. She's a fantastic problem solver. Any dog has a powerful sense of smell, but hunting dogs like Kiwi are more easily trained.
John Bonifield/CNN

My Account
  • Settings
  • Newsletters
  • Topics you follow
  • Sign out
Your CNN account Sign in to your CNN account

Live TV Listen Watch
  • World
    • Africa
    • Americas
    • Asia
    • Australia
    • China
    • Europe
    • India
    • Middle East
    • United Kingdom
  • US Politics
    • Trump
    • Facts First
    • CNN Polls
    • Elections 2026
    • Redistricting Tracker
    • Epstein Files
  • Business
    • Tech
    • Media
    • Calculators
    • Videos
  • Markets
    • Pre-markets
    • After-Hours
    • Fear & Greed
    • Investing
    • Markets Now
    • Nightcap
  • Health
    • Life, But Better
    • Fitness
    • Food
    • Sleep
    • Mindfulness
    • Relationships
  • Entertainment
    • Movies
    • Television
    • Celebrity
  • Tech
    • Innovate
  • Style
    • Arts
    • Design
    • Fashion
    • Architecture
    • Luxury
    • Beauty
    • Video
  • Travel
    • Destinations
    • Food & Drink
    • Stay
    • News
    • Videos
  • Sports
    • Football
    • Tennis
    • Golf
    • Motorsport
    • US Sports
    • Olympics
  • Science
    • Space
    • Life
    • Unearthed
  • Climate
    • Solutions
    • Weather
  • Weather
    • Video
    • Climate
  • World Cup 2026
  • Ukraine-Russia War
  • Israel-Hamas War
  • Features
    • As Equals
    • Call to Earth
    • Freedom Project
    • Impact Your World
    • Inside Africa
    • CNN Heroes
  • Watch
    • Live TV
    • Featured
    • CNN Headlines
    • Shows A-Z
    • CNN 10
    • CNN TV Schedule
  • Listen
    • All There Is with Anderson Cooper
    • Chasing Life with Dr. Sanjay Gupta
    • The Assignment with Audie Cornish
    • Terms of Service with Clare Duffy
    • CNN 5 Things
    • All CNN Podcasts
  • Games
    • Daily Crossword
    • Jumble Crossword
    • Photo Shuffle
    • Sudoblock
    • Sudoku
    • 5 Things Quiz
  • About CNN
    • Photos
    • Investigations
    • CNN Profiles
    • CNN Leadership
    • CNN Newsletters
    • Work for CNN

Health
Watch Listen Live TV
My Account
  • Settings
  • Newsletters
  • Topics you follow
  • Sign out
Your CNN account Sign in to your CNN account
Follow CNN

Download the CNN app
Download the CNN app

Terms of Use Privacy Policy Ad Choices Accessibility & CC About Newsletters Transcripts

© 2026 Cable News Network. A Warner Bros. Discovery Company. All Rights Reserved.
CNN Sans ™ & © 2016 Cable News Network.

Download the CNN app

Scan the QR code to download the CNN app on Google Play.

Scan the QR code to download the CNN app from Google Play.

Download the CNN app

Scan the QR code to download the CNN app from the Apple Store.

Scan the QR code to download the CNN app from the Apple Store.