No doubt. Sure, you can fool immature does, you can even fool 2year old bucks. But its those big boys that are weary of everything.
Think of it this way. A year old doe is like trying to fool a 7 year old human. How hard would that be. A 2 year year old buck, like trying to fool a teenager. Trying to fool a 5 year old mature buck is like trying to fool a well seasoned hunter who has been lucky enough to survive many situations and has remembered them all. Until he loses his mind chasin tail for a few weeks out of the year. Which like humans, I have seen many a mature man fall into this trap and come out very wounded.