How to see the age of adult golden hair? The age of the adult Golden can be judged by the development of the teeth. At 1.5 years of age, the cusps of the mandibular first incisors are worn down. At age 7, the first incisor of the lower jaw is worn to the root of the tooth, and the wear surface is longitudinally oval. at age 8, the first incisor of the lower jaw is worn to the front, and at age 10, the second incisor of the lower jaw and the first incisor of the upper jaw are worn to a longitudinal oval. at age 16, the incisor is lost and the canine is incomplete. at age 20, the canine is lost. The weight is about 26-31.5kg for male dogs and 25-27kg for female dogs.
