How much water should a dog drink per day?

Water is essential for every biological function in a dog’s body, from digestion and circulation to temperature regulation and joint lubrication. Just like humans, dogs can survive for a while without food, but only a short period without water. That’s why knowing how much water your dog should drink per day is one of the most important aspects of pet care.

How much water should a dog drink per day?

On average, a healthy dog should drink approximately 50 to 60 milliliters of water per kilogram of body weight per day. That means a 10-kilogram dog should consume about 500 to 600 milliliters of water daily. However, this is just a general guideline. Several factors can influence your dog’s water needs, including age, activity level, type of food, environment, and underlying medical conditions.

Dogs that eat dry kibble tend to drink more water than those on a wet food diet, since canned food already contains a high percentage of moisture. Active dogs, especially those who spend time outdoors or exercise regularly, will also require more water to compensate for the fluid lost through panting and physical activity. Puppies, lactating females, and older dogs may also have different hydration requirements due to their metabolic needs.

It’s important to monitor your dog’s drinking habits. Excessive thirst can sometimes be a sign of health issues such as diabetes mellitus, kidney disease, or Cushing’s syndrome. On the other hand, a sudden decrease in water intake could signal nausea, pain, or other medical problems.

Always provide fresh, clean water and ensure your dog has access to it throughout the day. In warmer climates or during hotter months, keep an even closer eye on your pet’s hydration to avoid dehydration or heatstroke.

If you're ever in doubt about whether your dog is drinking enough (or too much), observe their behavior and check for signs like dry gums, lethargy, loss of skin elasticity, or changes in urination patterns. Consulting a veterinarian is always the safest route when something seems off.

Maintaining proper hydration is one of the simplest yet most effective ways to support your dog’s health and longevity. Make it a daily habit to refill the water bowl and keep track of how much your pet drinks — it’s a small step with a big impact.

References

Guyton, A.C., & Hall, J.E. (2006). Textbook of Medical Physiology (11th ed.). Elsevier Saunders.

DiBartola, S.P. (2012). Fluid, Electrolyte, and Acid-Base Disorders in Small Animal Practice (4th ed.). Elsevier.