What bone should i feed my small dog?

Because your dog is smaller I would start her off on chicken bones. They are very pliable and soft. Chicken necks, legs or wings is a good place to start. Keep a close eye on her the first time to determine if she is a chewer or a gulper. If she does not take her time and tries to swallow it whole then you may need to move to larger cuts of meat and bone to encourage her to take her time.