dude i would never fight my dog thats just wrong on a lot of levels. the only reason i let her pull weights is becasue shes a pit and she enjoys it. not to mention i do alot of hiking and mountainerring so when she goes and she has her pack she can pull her own weight. the other activity is just to exercise her and keep her healthy . i wasnt trying to get neg comments just thought id share. put the pulling is humane theres nothing wrong with it its not like im giving her creatine or steroids. she a helthy good dawg