How to get range on a dog?

mine have never been real rangey in no sign, but ive changed my game a bit this year and it has worked well even on my grown dogs.

I keep them up in the wheeler and go to where I feel like dropping wether in sign or not. kill the wheeler, unclip the dogs and read a book or play a game on my phone. I don't talk to them much or mess with them, just leave them to it and they have started really getting a lot better about range.

one of my best ones has always been frustratingly short ranged, but after a month of doing him this way, he left out and stayed gone about 2 hours yesterday morning. never did wake up a boar hog, but hunted hard and I wasn't mad at him