Dogs ain't never to young to go to the woods or pasture. Always something to be learned , even if it means riding on the bed of the truck . A good working dog should always have the "want" to go, its up to you to know when their body will no longer allow them to.
^^Great post. I have a pup that just turn 4 months old and I've taken her to the woods. Kept her on a lead the whole time but just to expose her to riding in the box, and the sites and sounds. Watching dogs that a pup lives with is a big time teacher for them. I think you should expose your pup to as much as you can starting around 3 months but keep them close, around 6 months I'd let them tag along and run their own.