my wife and i usually fly through iAd on UA. their lounges really suck, so we pack a light dinner, bring a bottle of champaign, and sit away from all the people for an hour or so waiting for the flight. about half the time, a bunch of uniformed guys bring a bunch of very official looking dogs to practice searching the area. they ask if we would mind staying, so the dogs can search around us. there are usually 3 to 5 dogs tearing through the section looking for contraband. i am certain these dogs are dander and allergin free, as they have never bothered me. they are german shepard looking dogs, and search for better part of an hour.