They probably want to check for some type of cross-contamination. I don't see it being much of a problem as with humans though. I only say this because, while I don't personally know any deer, there are plenty of people in this world who clearly have their heads up their...!!!
Sorry, it was just teed up there all nice and perty. I couldn't resist.
I haven't heard anything on that yet, but then I only got my tags this past weekend, so I still may.
Bring them in on a string. I love this term, if you want to be successful on calling in Elk, try not to just sound like the other caller. We all laugh at each other when we are practicing Elk calling at home or while camping. When I first started calling in Elk, I had no idea what i was doing and it's funny how many I could call in. The biggest Bull that I have called in to date was actually my first. I was making cow calls and screwing it up big time. But it's obvious I didn't screw up...