??

could be several reasons...

some dogs will never range out...because it is not in them to do so...

other dogs will not range out on their own...but will follow a good strike dog all day long and look good doing it...

other dogs don't range out because the dog handler moves too fast and the dog might be trying to keep up with the 4 wheeler...if you hunt this way it is best to watch the dogs and when they act like they want to work a track you stop and let them work it out...sometimes when doing this the dogs will follow the track and find a hog...other times when you stop you may need to walk in the general direction of which way the track went and this will sometimes encourage the dogs to range out or follow the track, or, you might actually put them on the hog by doing this...

another thing to try is to keep the dogs fresh and energetic...take them to a good place in the woods with fresh hog sign and dump the dogs out and just sit in the truck or 4 wheeler...the dogs should get bored and roll out...

it is all about setting the dogs up for success...and improving the dogs style of hunting...