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Are there any audio deterrents for pigs like there are for birds?

I think I've read about playing hawk screams or bird distress calls to scare away birds from airports. Would something similar like playing a cougar scream be enough to keep pigs out of an area?

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Hogs and boar are not afraid of much once they're fully grown. They have few natural predators, and animals known to prey pigs them typically only prey on piglets, as a boar can turn the tables on even the deadliest predators if they get a little lucky (black bear and cougars for example).

Your best bet for audio deterrence would be firing blank shells, and that's most effective on a sounder (herd) that's already been hunted.

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