I used a piece of kabana with Jett, i would put the leash on her and she would sit and not move, so i got out a pice of kabana and walked out in front of her. Still holding the leash i held out the treat to her and she came. I gave her the treat told her she was a good girl and repeated the process. I then started walking backward while she walk walking toward me (still holding the treat) I would only walk a few meters before getting down praising her and rewarding her with the treat. I found this also helped with stairs, Jett HATED stairs, even with kabana, but as she got older she became more confident with the and now races up and down them
Good luck.
Trina