They also sell "bait boxes" - the only poison stuff I coudl
   recommended - for the outside of your house. BUT - you'd have to
   make sure your house is sealed before using them (otherwise,
   they might run back inside). A rodent can get into a hole the
   size of a quarter. So look carefully for any gaps around your
   house. Still, hopefully once you clear out this batch, you
   should be okay for a while. "