Blue Boy is the largest puppy in the litter. He is about the same personality as his brother, green boy. He differs that he is slightly bigger but only by .2 ouces which will likely make no difference in final weight. They are both on track for right around 30 lbs. I can't really elaborate futher on him except that I think we have a twin syndrome with Green Boy because there is only two of them. Experts call this littermate syndrome.