dog refuses to come home

[harvey2k11]

i have a 6 month old chocolate labrador, but recently having problems getting him home from walks, we live opposit a large field and have to cross a road so we attatch his leader just before the road, and he then lies down 100metres away from home and refuses to move, we have tried tempting him home with treats, this did work for a short while, but he is now getting wise to this and refuses the treats, this is quite stressful, any help is appriciated

[harvey2k11]

we have tried that lol, we have just got back from a walk the neighbours was also out with their dogs so that encouraged him to come home this time, but cant always rely on other people helping ,