The USA's Longest Average Lifespan Dog Breeds Are These  

Bearded Collie Average lifespan: 13.9 years Average size: 45-55 pounds 

Lowchen Average lifespan: 13.9 years Average size: 15 pounds  

Lakeland Terrier Average lifespan: 14.2 years Average size: 17 pounds

Havanese Average lifespan: 14.5 years Average size: 7-13 pounds  

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Papillon Average lifespan: 14.5 years Average size: 5-10 pounds

Shiba Inu Average lifespan: 14.6 years Average size: 17-23 pounds  

Lancashire Heeler Average lifespan: 15.4 years Average size: 9-17 pounds

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