I am having a problem with small rats or large mice. We have poison (Just One Bite) down in tubes where the chickens can't get to them, but the rats/mice don't seem interested, either. Has anybody out there tried those electronic plug-in rat repeller things? We have never had a problem like this before. Our coops are old with dirt floors and it wouldn't be possible to seal them. The spaces in the walls are too small for large preditors, but these rodents seem to come and go as they please. Any suggestions would be appreciated.