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Jack Russell Terriers are considered an intelligent, high-energy breed. They require consistent training and exercise to maintain their temperament and to occupy their minds.
Jack Russells who are not trained on a consistent basis, or are not exercised regularly, may occasionally exhibit aggressive or unmanageable
behavior. In America, several Jack Russell rescue networks have to work constantly to find temporary and permanent homes for
Jack Russell Terriers whose owners could not meet these requirements for keeping
Jack Russell Terriers as house pets.
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