I have watched lots of documentaries on these dogs & they seem really on edge ... Particularly the suspect apprehension & drug/narcotics "sniffer" dogs seem really on edge & unstable ... Are they safe to be in the public (I know in some cities police dogs to on patrols in the streets)? Also why must they be "so" on edge? It doesn't seem healthy or safe? Also I have seen situations (both in training & real situations) where the dog has to be choked off a decoy or suspect.