Giant Mutant Cows of Belgium This enormous Belgian cow got its huge size and muscle mass from natural mutation of the gene or sometimes called double muscling, which results in accelerated lean muscle growth. Worlds Biggest Dog Hercules, an...

Giant Mutant Cows of Belgium This enormous Belgian cow got its huge size and muscle mass from natural mutation of the gene or sometimes called double muscling, which results in accelerated lean muscle growth. Worlds Biggest Dog Hercules, an...

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