Important Disclaimer
The information provided here is for general pet health education only and is not a substitute for professional veterinary advice, diagnosis, or treatment. Never disregard professional veterinary advice or delay seeking it because of something you read here. If your pet is experiencing a medical emergency, contact your veterinarian or an emergency animal hospital immediately.
- Species & breed
- Dog
What a sweet little guy — Westies at 9 weeks are just the best! It's great that you're thinking carefully about what goes into Murphy's body at such a young age.
Here's the general picture: plain, fresh water is really the gold standard for puppies. At 9 weeks old, Murphy's kidneys and digestive system are still developing, and they're designed to handle clean water — not water with added minerals or electrolytes.
About electrolyte waters like SmartWater:
SmartWater contains added minerals (calcium, magnesium, and potassium salts). In healthy adult humans, these amounts are very small and harmless. For a tiny puppy, though, even small additions to his mineral intake can add up — especially since his kidneys aren't fully mature yet and aren't as efficient at filtering and balancing minerals the way an adult dog's would be.
The short version: there's no benefit to giving a healthy puppy electrolyte water, and it's generally not recommended as a regular water source. Plain filtered or tap water (if your tap water is safe for people, it's typically fine for dogs) is the right call.
When electrolytes are sometimes used for puppies:
Electrolyte support is occasionally discussed in situations where a puppy is sick — for example, if they've had significant vomiting or diarrhea and are at risk of dehydration. But that's a conversation to have with a vet, not something to do on your own at home.
A few tips for keeping Murphy well-hydrated:
- Offer fresh water in a clean bowl at least 2–3 times a day (or keep it available constantly)
- Wash the bowl daily — bacteria can build up quickly
- Watch that he's actually drinking; very young puppies sometimes need a little encouragement
- If he seems reluctant to drink or you notice he's lethargic or his gums look dry or tacky, that's worth a vet call
When to see your vet: If Murphy seems unusually tired, isn't drinking, has vomiting or diarrhea, or you're concerned he might be dehydrated, reach out to your vet promptly — puppies can go downhill faster than adult dogs. Also, if he hasn't had his first puppy wellness visit yet, now is a great time to schedule one so you can ask all your new-puppy questions in person!
Was this answer helpful?
Your feedback helps us improve answers for every pet.