I have an american bulldog that is about 10 months old... He seems to have a very bad problem when it comes to putting him on a leash. Unfortunatly he weighs about 85 lbs and I only weigh 140 so he tends to yank me around a little bit when I take him outside. I've tried just about everything to get him to stop, but it doesnt seem to work... What makes things worse, is that I live on the second floor of an apartment building, and so when I have to walk him down the steps he comes very close to pulling me down face-first; the only method that seems to save me is running down the stairs when he pulls. I tried a prong collar... It worked for a few weeks, but when he got used to it, the pulling started again. I was just wondering if anyone had any suggestions on how to get him to quit?