I remember hearing about something this a long time ago. A woman had some form of cancer that had not been diagnosed. I want to say it was uterine or ovarian, but I may be wrong. Anyway, her dog was consistantly sniffing, licking and pawing her in the affected area. She mentioned it to her doctor and some tests were done. Sure enough they caught early stages of cancer. I'm sure there is more to the story than what I remember but that was the gist of it. Animals have wonderful senses- we should listen to them more often.