I used to hood hunt quit a bit and several times I seen dogs come off the hood and go a mile or further and get bayed. I can assure you my dogs didn't "wind" a hog that far. In fact I'm sure they winded sign or a track and "trailed" the majority of the distance.
open or silent dogs? it is possible the dogs jumped the hog and brought it to bay at a mile...just saying on account you are sure the dogs did not wind that far....or like you said, they winded the track scent and then took the track from there...
some of the old line kemmer curs with the Gold Nugget line have great winding ability...more of a natural trait it seems...