The long, lean Borzoi looks different at birth—it takes a few years for their head to grow into its signature elongated shape. At birth, Borzoi puppies have a bent nose. The nose begins to straighten after a few weeks, but the head won't be fully grown for about three years—it has about 10 inches of stretching to do in that time.
Consult with a veterinarian to ensure you're feeding your Borzoi an appropriate diet from puppyhood and through adulthood. Borzoi aren't fully grown until they reach two years old. Growth formula puppy foods and foods formulated for large breeds can contribute to cartilage and joint issues, but an appropriate diet can help prevent these issues.