Here's pictures of my mom's 2yr old boy, Bishop. He's got the leaner pitty build and is also SUPER active. Although he's lean he's not ribby like I have seen some dogs, they definitly Shouldnt be ribby. I think your boy, Sprocket, looks great and healthy. His coat does seem dull though and those foods with all the fillers can end up causing skin/coat problems and such so I would definitely suggest getting him onto a better quality food.
Try homemade recipes if you're just looking to bulk them up, it'd be MUCH healthier. But, like some have already said, that black one is definitely a thick dog and i think his size is great & wouldnt change a thing!
Try homemade recipes if you're just looking to bulk them up, it'd be MUCH healthier. But, like some have already said, that black one is definitely a thick dog and i think his size is great & wouldnt change a thing!