The easiest ways to add muscle to a pit bull are by engaging him in muscle-building games, such as tug of war or weight pulling, having him do daily flirt pole exercises and increasing his protein intake according to the ASPCA. Not all pit bulls can have large muscles, but there are several ways to help a dog achieve a muscular look.
Protein is especially important when it comes to building muscle because it helps build cells and tissue. Vitamins are another important part of muscle building because they help the body absorb the fats and carbohydrates which are essential for providing energy.
When bulking up a pit bull or any dog, choose activities the dog enjoys and don't forget to always offer plenty of cool fresh water before, during and after his workouts. Water is the most important nutrient, and a lack of water in the dog's body can undermine all attempts at building bulk and quickly make a dog ill.