Congratulations! Your Chihuahua puppy is finally home! She's gotten a healthy thumbs-up from your veterinarian and is ready to begin a lifetime of adventure with you. Now what? Puppies don't come preprogrammed to accept sudden changes automatically. In fact, for your puppy the first twenty-four hours in her new home could be the most stressful day she'll ever have in her life. That's where you come in to help her make the adjustments so she can settle in quickly.