I think they can smell the size of a footprint like we can see them and tell what made it.

Dude.....are you alright!!!!!? Will you listen to yourself for crying out loud. Who is your dealer? I definately want some of what you have! And fyi...deer are not that smart...clever at times, yes. Smart...no. If they were half as smart as most guys think they are, why do so many of them get run over by cars? THINK ABOUT IT.