I recently had "tree rats" getting into a couple of the bird feeders that were up on poles. So I put some vasiline on the pole about two feet from the bottom up to about 6 foot high. It was funny as all get out watching those "tree rats" try and climb that pole and slipping and sliding right off. I just haver to wait and see how they get around that, I know it won't take long. I also had ants get into the "points" on my old well I use for the shed out came they vasiline agian it worked on that also. The ants got stuck in it while it was warm and plyable not to sure how it will do when it freezes though. I did put down some ant killer inside the pump house so maybe they will die off.