The appearance characteristics of puppies are very different from those of adult dogs. Their bodies are smaller, their noses and claws may be lighter than those of adult dogs, and their hair is softer. Under the protection of fluff, their bodies are softer than those of adult dogs. A mother dog can usually give birth to 5- 10 babies. Usually, the baby is a smooth and soft spheroid at birth. There is no separate web between the baby's front paw and back paw, which means that the baby can't swim. Babies' eyes are usually closed, and their eyes begin to open slowly within two weeks after birth.

2. Variety characteristics of puppies and babies

Different breeds of puppies have different looks, and their physical characteristics, hair properties and facial expressions are obviously different. Some breeds of puppies are very cute, such as dachshunds and Chihuahuas. However, some breeds of puppies may appear more mature, such as German Shepherd and Song Shiquan. In addition, some breeds of puppies grow ears and tails earlier than other breeds of puppies, such as bichon dogs.

3. Behavioral characteristics of puppies and babies

The behavior characteristics of puppies are different from those of adult dogs. Babies usually appear more lively and active, and toys and games will make them happy. In the process of baby's growth, they often play, bite and put themselves in danger, which is the necessary stage of their growth. In addition, the puppy is also very dependent on the external environment. If the dog mother and other pets can keep close contact with the baby, then the baby will also show better social skills in his later life.

4, the puppy baby's growth process

The growth process of a puppy is divided into several stages. In the 4- 16 days after the baby is born, the baby usually only moves between sleeping and drinking milk. From 16 days to 4 weeks, the baby's vision and hearing began to develop. At this stage, babies begin to learn how to walk and grow up, and they also begin to become more and more active. From 4 weeks 12 weeks, babies' social skills begin to develop, and their interaction with dog mothers and companions will increase significantly. At this stage, the baby should start eating, defecating and resting regularly. After that, the growth of the puppy will continue until adulthood.