Dogs detecting cancer

"A Baltimore-area woman and her oncologist believe her search-and-rescue dog "sniffed out" and detected her lung cancer early enough to possibly save her life."

"Around February this year, every time I would sit down, Heidi would start barricading me and literally not let me get up," Wills, 53, said. "She would scratch my arm, and she was very panic stricken and panting a lot. Heidi continued doing this for about a week when she suddenly became "more upset and insistent" and "started taking her nose and stuffing it in my chest and keeping it there and breathing in really deeply," added Wills, who lives in Halethorne, Maryland. She said Heidi continued the behavior for weeks."

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