This is how she convinced her owner that something wasn't right.
Sierra, however, wasn’t convinced. She tried to show Herfel that something more serious was going on by curling up in a ball and hiding in the back of the closet. And it turned out Sierra was right.. She later underwent a full hysterectomy to remove her uterus and chemotherapy.Herfel finished treatment in April 2014, but just a year later, Sierra hid again. The cancer was back–and now it was in Herfel's liver. Then, in 2016, Sierra returned to her spot in the back of the closet.
Sierra had the same reaction when the Herfels had a friend over who also had ovarian cancer, and again when a new worker showed up one day during a kitchen remodeling job. They contacted the worker’s boss, feeling obligated to let someone know. Herfel is now cancer-free and plans to spread Sierra's story as much as possible. “I just feel like my story can let people think about their animals and think, 'Wow, my animal did this when I got diagnosed.' Just to give the animals credit that they are pretty smart,” she told theSierra isn’t the only dog who can smell illness. Dogs' noses have as many as , compared to a human's mere 5 million.
That powerful smelling system enables dogs to detect subtle odors given off by cancer cells called volatile organic compounds. Most dogs have to be trained to recognize these scents, but Sierra was clearly a special case. train dogs to detect the odor of human disease in samples such as urine, breath, and skin swabs. MDD pups then participate in research studies to advance the understanding of how dogs can help with medical diagnoses.more than 95% of the time, according to CNN.
The research on how pups can be used in regular medical practice is still developing, but thanks to organizations like MDD, it’s certainly advancing. Who knows, maybe someday we’ll have dogs with special sniffers like Sierra’s in hospitals everywhere.
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