I have seen the fishing line crossing the top of the pen work ...something else I did but it was a goose poop problem at the lake camp....I put white chalk line around my camp grounds and the geese only walk to it but won't cross it....for some reason....now I have had only one or two (maybe blind) that got in but as a whole, I have every camper now doing it...it works...I just laid the white line on the ground ....I have 3 ducks I hand feed...and they will walk to the string....but not cross it....hum..if that works everywhere?....not sure but it works for me.....only one thing to do with the owls...and any other overpopulated critters that are gettin to be a pia....
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mugrump
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