both ends

I can see mailman
with a dog
attached to his grey
pant leg,
he's dragging it along,
it's a small
dog, his teeth
are sharp
and won't let go.
the mailman pulls it
along his route,
the dog's eyes,
bug out
brown and watery.
he's unsure what to do
now.
his weary snarl growing weaker,
getting what he wanted
finally.
now what?
i understand both,
the dog
and the mailman
as the pile of junk mail
hits the floor
falling through the slot.
I've been on
both ends
of the bite.