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Feral pigs, like these shown in Florida, are alarmingly growing in number in Canada.

Imago Images via Reuters

‘Super pigs’ threaten Upper Midwest

America faces an invasion unlike any other – and it’s a “super pig problem. The invasive swillers have adapted to survive cold climes, and they’ve been thriving in Canada and some US states. The trouble is, these piggies breed at a higher-than-normal rate, and a whole lot of the 600-pounders threaten to trot south.

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