All puppies nip or bite at your hands, feet, and ankles. See the #1 reason you should not allow this behavior any more, How to stop a puppy from nipping and biting, Why puppies bite, When puppies stop biting, and All about puppy teeth!
Believe it or not, a puppy is never too young to learn basic dog commands. In fact, you can (and should) introduce puppy training the day you bring your new dog into your house. A well-behaved dog is what everyone wants, but not everyone wants to start the dog training early enough. By training your puppy early, she will always know what's expected of her inside your home.