Canine adolescence — roughly 6-18 months depending on breed — is a high-risk period for behavioral problems, relinquishment, and euthanasia requiring targeted welfare interventions.
Canine adolescence is the leading period of welfare crisis for companion dogs. The combination of reduced impulse control, increased independence, and owner frustration with seemingly forgotten training creates a dangerous dynamic — owners give up on dogs who appear untrainable, leading to relinquishment. Dogs surrendered during adolescence enter shelter systems at high risk of behavioral euthanasia for treatable conditions. The neuroscience is clear: adolescent dogs are genuinely experiencing a developmental phase with reduced behavioral control capacity, not deliberately defying their owners. This framing reinterpretation — from willful disobedience to developmental limitation — is the single most important welfare intervention, enabling owners to maintain commitment through a temporary phase. Continued consistent, positive training during adolescence produces adult dogs with excellent behavioral welfare.