Dogs can be very nosy, and in the case of Marine veteran, Stephanie Herfel, she’s grateful for it. She says her Siberian Husky, Sierra, saved her life three times by sniffing out her ovarian cancer every single time.

Source: Facebook/Stephanie Herfel

In an interview with the Journal Sentinel, Herfel reported, “She put her nose on my lower belly and sniffed so intently that I thought I spilled something on my clothes. She did it a second and then a third time. After the third time, Sierra went and hid. I mean hid!”

Source: Facebook/Stephanie Herfel

Because Herfel had been experiencing abdominal pain, she got it checked out at an emergency room. From there, she saw a gynecologist several weeks later who confirmed Sierra’s initial ‘diagnosis’ that something was wrong. She was diagnosed with stage 3C ovarian cancer and had surgery and chemotherapy in 2014.

Source: Facebook/Stephanie Herfel

Her cancer returned in 2015 and then again in 2016. It came back first in her liver and then in her pelvic area. Both times, Sierra went and hid, according to Herfel’s Facebook page. She had to wait three to four months for scans to confirm, and in all instances, Sierra was right. Not only that, but Sierra sniffed out a friend’s tumor as well. Talk about an amazing dog!

Source: Facebook/Stephanie Herfel

Herfel is on the road to recovery, taking chemotherapy pills, and plans to write a book about her journey with Sierra. We can’t wait to read what promises to be an epic book. Great job, Sierra!

Source: Facebook/Stephanie Herfel