Jim....two suggestions. The first, I guarantee works as we had continual and
major mouse problems with our Canada cabin. Build several wood boxes
about the size of cigar boxes. (use screws to secure the top) Put 6-8 chunks
of mouse bait bars in each (available at HD or most any hdwre store), drill a hole
in one side the size of a nickel. Refill with bait in the spring and again in the fall.
This will not work for rats as the hole is too small. With a larger hole, you will
also kill chipmonks and squirrels, so I would go with hand grenades for the rats.
Second and more long range. Build and install an owl house (lots of plans on
Google) and let the owls control your rodents. Our local Craigslist usually has
owl houses in the farm and garden section, but they are spendy. Some will even
install them.
Were it me, I would do both but start with the cigar box method until you know
you have residents in your owl house.
Good luck and don't buy any cat food for your cat. Let him earn his keep.
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