Weight effects endurance. He needs to improve his tone and strength, not increase his weight. He Needs to add Muscle bulk which doesn't necessarily mean higher weight. Currently he is either A) got too high skin folds reducing his tone or B never lifts a thing and has no tone which means reduced strength or C a combination of both.Gaff is pretty quick across the ground and has a fair bit of endurance (you have to admit that he does run all day). Doesn't "bulk" remove some of that endurance?