If you are concerned about your puppy's hydration, talk to your veterinarian.
Should you give 18 day old chihuahua puppies water?
No, you should not give 18-day-old chihuahua puppies water. Puppies of that age are still nursing from their mother, and they get all the water they need from her milk. Giving them additional water can lead to health problems, such as diarrhea and dehydration.