If the K-9 officer makes a routine traffic stop, Rin Tin Police Puppy ought to stay locked in the patrol vehicle.
And I despise the idea that the canine is a "police officer" as some states value the dog's life above that of a human being.
The dog is a tool just as a mechanical sniffer would be,although the reason-impaired might balk at the idea of a police officer sniffing the car mechanically . That also brings up the "sniffing" flashlight,which is another bad ruling. Devices can be made so sensitive that they will alarm on perfume and aftershave alcohol odors,thereby giving "cause" for search and further testing. If a human in average health can't see or smell the suspected substance while STANDING out side the open window ,the a search warrant ought to be required. The courts have been trashing our rights for years, and made us less,not more safe.
I am not sure what you mean by Ordinary Traffic Stop. Ordinary traffic stops don't involve guns either, but they bring em anyway. Rather have the dog than the gun.