i know alot of people dont have access to this but one great way to get a pups confidence up is to run him with other dogs and do it on horseback........myself and my huntin partner have had good success with this.......dont work the pup on a 4wheeler for a few months........(if possible) then by the time u pull the old 4x4 out the pup will have established his role and the last thing on his mind will be worrying about gettin left.........i can honestly say that our older dogs hunt GOOD off of 4wheelers but they hunt GREAT off horses.......never could figgure out exactly what it is about the horses but i think it lets the dogs work at their own pace........we hardly ever see the dogs when we are on horseback i think they realize that they can hit the woods and work wherever they want and not just stay in front of the wheeler........just my 2 cents..........hopefully it'll help u out.....if not i'll take the pup from u haha......j/k
.....good luck and happy hunting
Justin