If a two-week-old newborn appears to be constipated, it is important to encourage them to drink as much as possible, whether it is breast milk or formula. You could give them a few small sips of water throughout the day, following the recommendations provided in the link. It is essential to ensure that the water is appropriate for the baby's age and needs. If you have any other questions or concerns, do not hesitate to seek advice from a healthcare professional.