How much water dogs need
The veterinary baseline is 50–60 ml per kilogram of body weight per day (~1 oz per pound). For a 15 kg dog, that's about 750–900 ml.
What changes daily water needs
- Diet — wet food is 70–80% water; dogs on wet/raw diets drink dramatically less.
- Activity — exercise adds 20–50% to baseline needs.
- Temperature — every 10°C above 20°C increases needs by 10–15%.
- Life stage — puppies need more per kg; lactating dogs can drink 2–3× normal.
- Medications — diuretics and steroids significantly raise water intake.
Warning signs to watch for
Excessive thirstDrinking more than 100 ml/kg per day consistently is one of the earliest signs of diabetes, kidney disease, Cushing's, and certain infections.
Reduced thirstDrinking notably less, or refusing water entirely, can signal nausea, dental pain, or kidney issues.
Practical hydration tips
- Provide fresh, clean water at all times — change daily, not topped up.
- Use a wide, stable bowl. Stainless steel or ceramic is easier to keep clean.
- For finicky drinkers, try a pet water fountain.
- On hot or active days, offer water every 1–2 hours.
- Mark the bowl with a line, refill daily, notice the rate of drop.
Frequently Asked Questions
Can a dog drink too much water?
Yes — water intoxication happens most often during long swimming or fetch sessions in lakes. Rare from a bowl.
Is tap water safe?
In most developed countries, yes. Filtered water is reasonable if your tap is heavily chlorinated or you're on well water.
My puppy drinks tiny amounts then walks away. Normal?
Yes. Puppies drink frequently in small amounts. Cumulative intake is what matters.