Our 4-legged buddies possess vast capabilities we, as mere humans,  haven't tapped into as of yet. Such as the cadaver canine, who recover human remains. The Police K-9 unit, sniff out drugs in suspected cars as well as in Airports. Maybe one day, this same canine behind the shield will be able to sniff out & take down 'bad cops' as well. The doggy door is wide open for many opportunities the dog may serve man.