Why can't my Sistah play with me?!

My healthy blue heeler wants to know why the heck her little sistah can't play with her and what is the big deal with a broken leg anyways?! The lil one saw a surgeon today and it looks like as long as we can keep her quiet for several weeks she won't need surgery...fingers crossed that the bone heals properly. Have you ever tried to keep a blue heeler quiet and calm? Even on sedatives they have more energy than other dogs. Wow do I have my work cut out..