From double digits up through their 20's, these are the breeds known to live the longest. Chihuahuas. The longest living breed comes in small packages. . Malteses. With an average lifespan of 15 years, they stay puppies at heart. . Lhasa Apsos. Their general lifespan is from 12 to 14 years. . Beagles. . Pomeranians.
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