I bent his arm up and now it sort of looks like he's doing some sort of crazy hoodoo dance. I may replace the lead in his hand with some sort of folk art cursin' stick.
Then I bent his arm low and he still looks like his doing his crazy dance. If I paint the leash around his arm like it's a bandage or just some cloth wrapping and maybe make that thing in his hand look like it's green stone/crystal, he probably would look more like he's dancin' crazy like than pulling back on a lead.
Tipping him forward to put more weight on his straight leg ends up looking really wrong.
I think lowering his arm will be all that you need to tranform him from being pulled along by a dog to being crazy looking.