My better half did a bang up job making a copper ring for the cat's food bowl! We've been field testing it for the past few nights, and thus far the cat's bowl has been slug free!
You can't see it, which is probably the best part
Ah, the secret is revealed!
As you can see, the ancient secret to be revealed here is the legs added to the form to make the copper barrier harder for the slugs to initially reach. Since the copper does indeed chemically react with the slug's slime (I looked, there does not seem to be a technical term for slug slime) and basically gives the slug a little shock. So far it has worked beautifully with zero slugs observed in the bowl for the time period testing. Given that we had previously observed several slugs per night in the bowl prior to this experiment I'd call it pretty damned successful.
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