Yes, a body hit with a bullhead just bounces back.  A dead center hit in the wattles will bounce back as well...  I've killed 30 or so birds with a bow, body shots- even hit perfectly can still run or fly great distances.  I've had 3 that I cut the spine in half between the legs and wings still get airborne and fly a couple hundred yards before dying..  The neck and head are as big as the internal vitals, you can see them and when you miss, you just miss.  A miss by an inch or two body hit is a wasted bird with a standard broadhead.
When you miss with a bullhead you don't lose the arrow.  I miss a lot...