From the picture, the dog's teeth have all grown out, because I can't see clearly, but I feel that the innermost molar maxilla (that is, there are two teeth behind the innermost big tooth) has grown out, which means it is an adult dog. Actually, just take a closer look at it yourself. If there are two teeth behind the innermost big teeth, the three below are adult dogs. If there are no teeth behind the big teeth, it is a puppy!
The details are as follows. See for yourself:
The distribution of permanent teeth in general adult dogs: 6 upper and lower incisors, 2 upper and lower dogs, 8 upper and lower premolars, 4 upper and lower molars and 6 lower molars, totaling 42. The number distribution of puppy deciduous teeth: 6 upper and lower incisors, 2 upper and lower canine teeth and 6 upper and lower premolars, a total of 28. The growth, wear and sharpness of teeth are the most obvious age of adult dogs, and the age of puppies can be judged from the aspects of quantity, strength, new and old teeth, brightness and so on.
Judging the age of a dog is roughly based on the following criteria:
About 20 days: the teeth gradually grow unevenly.
30 ~ 40 days: the front teeth of deciduous teeth are long.
2 months: the deciduous teeth are all long: sharp and white.
2 ~ 4 months: replace the first deciduous incisor.
5 ~ 6 months: Replace the second and third primary incisors and all primary canine teeth.
More than 8 months: all teeth are replaced with permanent teeth.
1 year: the permanent teeth are long, smooth and firm, and the upper front teeth are pointed.
1.5 years old: peak wear of mandibular first incisors.
You can't judge the age of a dog by its size, because there are many kinds of teddy, which can be generally divided into:
Tea cup body (:48 cm), the age can only be judged by teeth!