Some dogs grow older without ever completely growing up. From toy-obsessed retrievers to mischievous terriers, these 18 dog breeds are known for keeping their playful, puppy-like spirit well into adulthood and sometimes their senior years. See which breeds make the list, why some dogs stay playful longer, and how to keep the fun going as your dog ages.

The post You Thought They’d Mellow With Age? 20 Dog Breeds That Never Lose Their Playfulness appeared first on Canine Journal.