RE: deer scent ?
First of all I am not a big beleiver in deer scents, I am sure some of them do help, but they are no substitute for playing the wind or good scouting. I am sure though that fresh scent if we are talking about natural scents are far better then old ones. If a buck can tell if a doe is in heat by simply smelling their urine then they can easily tell the difference between OLD urine and fresh urine.