I'm a retired longhaul trucker, who used to take my dog on the road with me ... whenever I was going thru a Dept. of Transportation check/search, they would immediately yank their drug-dog away from my truck, upon spying my dog ... I can only guess the presence of my dog either messes up their sniffing, or they just wanted to avoid a dog/dog confrontation, but they always left me alone ... :smokin: