this differs with each puppy. it depends on your bully. some will be fine on 3/4 cup 3 times a day some will need 1 cup 3 times a day. i think its more of is your dog not overweight or underweight and is your puppies stool good.
Your last comment hits the nail on the head as no two bullies are exactly the same. We tried feeding Harlea 3/4 cup 3x a day and she had explosive and through trial and error we have her on 1 cup 2x a day with fruits and veggies during the day for treats and she has been fine and gaining weight as she should.