I'm going to tag some training experts for you, but I will give you some tips that have worked for me… I have taken my bullies to basic puppy training, and it seems w/the bulldogs they are treat motivated. I use a good harness, and a short leash… get her used to walking w/you just around the house on the leash. And if you can get her to do the "watch me" command… then try VERY short trips around the yard. Make sure to reward her each time that she keeps up w/you even if it's just a few steps… It may take time and practice, but hopefully she will come around. Good luck!!!