i would have to say yes they are because when it snowed, me and my buddy were out there all day and saw nothing, we left when it was dark, and that day before i walked in, i always spray doe urine on my boots so it leaves them a trail right to me, and i never saw any that day. the next day we went out to the same spot and there were tracks all along my footprints following me to where i was sitting. made me mad. never saw any that day either.
-Billy