Shar Pei
Because of its popularity after being introduced to North America in the 1970s, the breed suffered much inexperienced or rushed breeding. This resulted in not only a dramatically different look for the Shar Pei (as its most distinctive features, including its wrinkles and rounded snout, were exaggerated), but also many health problems. The American breed club states that few Shar Peis reach the age of 10 and it has a longevity program recording those dogs that live to 10 years or more.