This Dog Stays a Puppy the Longest

Photo of Douglas A. McIntyre
By Douglas A. McIntyre Updated Published
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This Dog Stays a Puppy the Longest

© Antonio Villascusa / Wikimedia Commons

The official term for a puppy is a “juvenile dog.” Puppies, according to some experts, age at different rates, based on size and breed. Large dogs tend to be puppies for longer, up to 15 months. For smaller breeds, the figure is closer to nine months. One set of experts even offers a “puppy age calculator” that allows owners to estimate how long they can expect their dogs to remain puppies.

Americans love dogs. There is no doubt about that. It is estimated that the dog population in the United States is almost 80 million and that 44% of households have a dog. We typically get dogs when they are puppies and form bonds that last a lifetime. It is when they are puppies that our canine friends are still a size we can manage and are perhaps the most irresistible. While they would perhaps never say it out loud, some dog owners may privately wish their puppy would never grow up.

24/7 Tempo set out to identify the breed that stays a puppy the longest. We compiled the list based on a range of factors for which data were available, including life expectancy and size, as well as other more intangible factors, such as temperament, playfulness and cuteness.

By these measures, the dog that stays a puppy the longest is the West Highland White Terrier. They typically weigh 15 to 20 pounds, and their average life expectancy is 13 to 15 years.

With their bright eyes, sturdy little bodies and pink ears, westies are hard to resist. Bred to hunt rodents in Scotland, they love a good chase, but they are also great family dogs. Like other dogs in the terrier group, westies are feisty and energetic.

Click here to see all 20 breeds that stay puppies the longest.
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Photo of Douglas A. McIntyre
About the Author Douglas A. McIntyre →

Douglas A. McIntyre is the co-founder, chief executive officer and editor in chief of 24/7 Wall St. and 24/7 Tempo. He has held these jobs since 2006.

McIntyre has written thousands of articles for 24/7 Wall St. He is an expert on corporate finance, the automotive industry, media companies and international finance. He has edited articles on national demographics, sports, personal income and travel.

His work has been quoted or mentioned in The New York Times, The Wall Street Journal, Los Angeles Times, The Washington Post, NBC News, Time, The New Yorker, HuffPost USA Today, Business Insider, Yahoo, AOL, MarketWatch, The Atlantic, Bloomberg, New York Post, Chicago Tribune, Forbes, The Guardian and many other major publications. McIntyre has been a guest on CNBC, the BBC and television and radio stations across the country.

A magna cum laude graduate of Harvard College, McIntyre also was president of The Harvard Advocate. Founded in 1866, the Advocate is the oldest college publication in the United States.

TheStreet.com, Comps.com and Edgar Online are some of the public companies for which McIntyre served on the board of directors. He was a Vicinity Corporation board member when the company was sold to Microsoft in 2002. He served on the audit committees of some of these companies.

McIntyre has been the CEO of FutureSource, a provider of trading terminals and news to commodities and futures traders. He was president of Switchboard, the online phone directory company. He served as chairman and CEO of On2 Technologies, the video compression company that provided video compression software for Adobe’s Flash. Google bought On2 in 2009.

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