A lot of protein
Make sure your pup is finished growing or at least nearly as far as the bones and joints go (at least a year and a half to two years). Attempting to condition or add bulk before that point can cause injury and contribute to things like hip dysplasia (and you often realise there's no need :-). After that point you can begin to safely condition and here's a link for that.
www.pitbulllovers.com www.pitbulllovers.com www.amstaff.org www.dogfoodanalysis.com
www.pitbulllovers.com www.pitbulllovers.com www.amstaff.org www.dogfoodanalysis.com
Well definitely don't use steroids, if they look unnaturally big they tend to look ridiculous. Go online and buy a spring pole, they love those and make sure you position it on a very secure branch just high enough so when the pit is holding on, he can just barely touch the ground. That will build muscle everywhere and they love it!