I have a white vinyl fence. The birds love to fly over to my yard for a drink out of my pool and then perch on my fence post caps and do their business. They were leaving many unsightly stripes down the posts. My solution was to make the caps uninviting. I removed each cap and drilled a hole slightly smaller than the shaft of a 1-5/8-in. ring shank nail in the middle of it. Then I tapped the nails through the bottom and replaced the caps. Now the birds see my point, and I don’t see any more stripes. — Paul, via email
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