Dogs are proving more and more invaluable to human lives; they are protectors. help the lost find their way, companions for the lonely and the ill,they guide the blind, , and help the deaf, they can detect an
epileptic seizure, and now, apparently, they can detect cancer.
I don't know if they would ever be used in treatement, but maybe we all need to start learning to talk dog. There could be a whole slew of things they are trying to tell us, if only we could understand them.