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The average lifespan of a mixed breed dog in the U.S., given proper care and food, is 12 to 13 years. A Rottweiler, which is a rather large breed, may live only 10 years to 11 years. However, an animal that is half Rottie and half medium-sized dog, say a Staffordshire terrier, may live the average lifespan. The smaller the "other half," the greater the chance for a longer life, in general.

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11y ago

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