These dogs have a long adolescent period, so they're not a good choice for people with sedentary lifestyles. (animalwised.com)
Levels of commitment were stable throughout the entire adolescent period. (link.springer.com)
Owners often give up their Bernese Mountain Dog during the trying adolescent period when the dog is especially rambunctious and too much for them to handle. (yourpurebredpuppy.com)