master trainer dina safiris is choosing dogs based uponblied but more importantly, their person personal tality >> good. get out. go. get it. get it. get it. get it. get it. so, it's not so much about having a good nose. it's more about having kind of >> yes. >> it's the trainability, the willingness to want to repeat over and over again, wanting to do the same thing over and over again in a small room. so, and other dogs will become board by -- bored by it >> she trains dogs in something they can show interest in. the ball? >> it may be hidden deep in the box or the cancer. he can't get to his toy. so, he has to learn how to tell us. and just going up and down and sniffing and waiting for the one that's the right box is not good enough. now, we train him to sit or lie down or paw or bark at the correct one. so you are training what's called your alert. eventually once the dog can detect where the ball is hidden. dina introduces breath samples from actual cancer patients. that's right. researchers here and in germany are testing dogs' ability to smell cancer from a person's breath. a muc