Max detected Maureen's cancer before the results of her test came back. In fact, the doctors had told her that her mammogram was all clear. Max knew better. Maureen saw a change in Max's behavior and the things he did. His reactions to her were different. You will see this in the video! It truly is amazing the abilities dogs have. This video brought tears to my ears for several reasons! We love these dogs but they love us as well. Dogs can also detect low blood sugar and seizures in humans! Check this video out. You will be amazed!