Hope this helps: http://www.vetstreet.com/dogs/your-puppy-what-to-expect-at-0-to-7-weeks
excerpts below, click on link for full article
The first seven weeks of a puppy’s life include a lot of change. If you think about it in our terms, your puppy will grow from a newborn to a toddler during these first weeks. You will likely not have much interaction with your puppy during this time because he needs to remain with his mother. If you’re acquiring your puppy from a breeder, pet store or shelter, your puppy shouldn’t be sent home with you until he is a little older. Read below to find out what else to expect during the first seven weeks of your puppy’s life.
Health & Nutrition
The first two weeks of life can be a hazardous time for your puppy because he is so dependent on his mother. However, a good breeder will be prepared for the litter’s arrival, making sure the mother is healthy and has received her vaccinations and other wellness care before pregnancy, and will watch closely for maternal neglect or other problems after the puppies’ birth. Tip: Very young puppies rarely cry. Crying is a sign that something is wrong with your puppy. If he cries, he may be sick, hungry or cold.
During the first few weeks of life, your puppy should get all the nutrition he needs from his mother’s milk. In fact, colostrum, the first milk a mother produces, contains antibodies that will help protect your puppy from many diseases. A veterinarian should examine all the puppies in the litter to make sure they are developing normally. The timing of this first visit may vary depending on many factors including the breed of dog and the experience and abilities of the breeder. When your puppy is about four weeks old, he will start to be weaned from his mother’s milk and should be gradually introduced to commercial puppy food.
Most puppies generally receive their first vaccinations around six to eight weeks of age, with boosters every three to four weeks until they are about 16 weeks old. Recommended vaccines may include a combination of canine adenovirus-2, distemper, parainfluenza and parvovirus. Some combinations may also protect against leptospirosis or coronavirus. Depending on where you live and other factors such as if your puppy will be a show dog or will be kenneled with other dogs, your veterinarian might recommend a Bordetella, or kennel cough, vaccine as well.
