The Germans could have used them to infiltrate our troops. I mean, some general could be going over the battle plans in his tent and he’d never suspect some dog sitting there scratching himself. And if anyone did get suspicious and started asking questions, the dog could just tell them who won the 1939 World Series.
Did we not use them in the Pacific during WWII?
I seem to recall reading something about it because they had an incredible ability to smell people who ate the standard oriental diet.