Here's why:
* Gastrointestinal Issues: Puppies this young have immature digestive systems and can easily get diarrhea or upset stomachs from water.
* Risk of Aspiration: Puppies at this age are prone to aspirating (inhaling) water, which can lead to pneumonia.
* Mother's Milk is Best: Mother's milk provides all the nutrients and hydration a puppy needs in the first few weeks of life.
If the mother is unable to nurse the puppies, you should contact a veterinarian immediately. They will advise you on the best course of action, which may involve bottle feeding with specialized puppy formula.
In summary, avoid giving water to 4-week-old puppies unless advised by a veterinarian. Stick to mother's milk or formula.