barlow
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I think there are three factors at play here.
Rough dogs who teach a pig that if you can make it X amount of distance . . you will be left alone.
Catching a pig for any amount of time and even just stressing him (let alone castrating him) and then releasing him . . . shows him that getting away at any cost is better than being caught and tortured.
The hogs most folks are running today are vastly different from the old free range rooters and slightly domesticated hogs that your grandpa worked and penned. The infusion of Eurasian boar genetics causes them to react differently to any combination of the above factors. Modern vs. old style hogs are as different as dogs and wolves. A feral dog that is caught and released will likely be easier to catch next time as long as he isn't handled too poorly. A wolf is going to be way more cautious . . and way more dangerous, afterwards.
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Logged
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Prey and Bay Dogs
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