1. Size: Puppies are typically born quite small, weighing only a few ounces. They grow rapidly during the first few weeks of life, gaining weight and increasing in size.
2. Eyes: Newborn puppies are born with closed eyes. Their eyelids typically begin to open around 10-12 days after birth, and their vision gradually develops over the next few weeks.
3. Ears: Similarly to their eyes, puppies are born with their ear canals closed. They begin to open around 14-21 days after birth, allowing the puppies to hear sounds.
4. Fur: Puppies are born with a soft, often sparse coat of fur. The texture, color, and pattern of the fur will vary depending on the breed and genetics of the puppy.
5. Behavior: Newborn puppies spend most of their time sleeping and eating. They rely on their mother for warmth, food, and protection. They may also cry or vocalize to communicate their needs.
6. Developmental milestones: As puppies grow, they will reach various developmental milestones, such as crawling, standing, and walking. The specific timeline for these milestones may vary among breeds and individual puppies.
It is important to note that puppies require special care and attention during the early stages of life. They should be kept in a warm, safe, and clean environment, and they should receive proper nutrition and veterinary care to ensure their healthy growth and development.