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MATURE ADULT: MONTH 18–48
A mature adult canine is fully developed physically, mentally, and emotionally. Depending on the breed, full maturity is reached between the ages of 18 months and four years. Since smaller breeds finish physical development sooner than the big guys, they also reach adulthood sooner.
The mature adult canine is much calmer and better collected than the awkward and challenging adolescent. At this point, all of the consistency, positive reinforcement, and patience you exercised during the previous periods should finally pay off.
