Forcing to the pile is NOT a blind drill; there is no need to stretch it out to that distance. It is part of yard work. It also should not be done in 6-8 inches of grass. Rather than ask about how to help your dog find the pile, you should find a more reasonable place to do the drill. Maybe a local park, school, or community area with low cut grass or sports filed. The point of forcing to pile is to get your dog going and to reinforce that going is the only option. If you've accomplished that (maybe you have and maybe you haven't) you may start looking for your T field, which should be a field where bumbers are clearly visible....just my two cents.