The size of butterfly dog is mainly determined by the growth of teeth, the peak of teeth, the degree of tooth wear and the appearance color. The teeth begin to grow in about 20 days, and the front teeth of deciduous teeth are flush in 4 ~ 6 weeks. Primary teeth begin to be replaced at the age of 2 ~ 4 months, and all permanent teeth are replaced after 8 months. At the age of l, the permanent teeth were flush, and the peak of teeth began to disappear at the age of 1.5. How old is the butterfly dog? The size of butterfly dog is mainly determined by the growth of teeth, the peak of teeth, the degree of tooth wear and the appearance color. The teeth begin to grow in about 20 days, and the front teeth of deciduous teeth have grown up at 4 ~ 6 weeks old. Primary teeth begin to be replaced at the age of 2 ~ 4 months, and all permanent teeth are replaced after 8 months. The permanent teeth are long at the age of l, and the peaks begin to disappear at the age of 1.5. In order to be easy to master, here are some ways to judge the age of a dog:

After about 20 days, the teeth began to grow.

4 ~ 6 weeks old: deciduous teeth have long incisors. At the age of nearly 2 months, all the deciduous teeth are long white, thin and pointed.

2 ~ 4 months old: replace the first deciduous incisor.

5 ~ 6 months: replace the second and third deciduous incisors and canine teeth.

After 8 months: all permanent teeth were replaced.

L-year-old: permanent teeth are long, white and bright, and front teeth are pointed.

1.5 years old: the first mandibular incisors are worn to the level of small peaks, which is called peak wear.

2.5-year-old: peak wear of mandibular second incisors.

3.5 years old: The first maxillary incisor has lost its peak.

4.5 years old: The second maxillary incisor has lost its peak.

5-year-old: The peak of the third mandibular incisor is slightly worn, and the worn surfaces of the first and second mandibular incisors are rectangular.

6-year-old: the third mandibular cusp is blunt.

7-year-old: The first mandibular incisor was worn to the root, and the worn surface was vertical oval.

8-year-old: the first mandibular incisors are worn forward.

10 years old: the worn surfaces of the mandibular second incisors and the maxillary first incisors are vertical ellipses.

16 years old: the front teeth fall off and the dog's teeth are incomplete.