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Water Requirements for Dogs and Cats

Water is the most essential nutrient in your pet's diet. Dehydration can lead to urinary tract issues, kidney disease, or life-threatening organ failure.

July 16, 2026

The Importance of Hydration in Pets

Water is the most essential nutrient in your pet's diet. It makes up approximately 60% to 70% of an adult dog or cat's body weight. Dehydration can quickly lead to urinary tract issues, kidney disease, or life-threatening organ failure.

Daily Water Guidelines for Dogs

A general rule of thumb: a dog needs about 1 ounce (30 ml) of water per pound of body weight daily.

  • Small Breeds (10 lbs): ~10 oz (approx. 1.25 cups) per day.
  • Medium Breeds (40 lbs): ~40 oz (approx. 5 cups) per day.
  • Large Breeds (80 lbs): ~80 oz (approx. 10 cups) per day.

Tips to Encourage Pets to Drink More

  1. Use a Pet Fountain: Cats and dogs prefer running water over standing water.
  2. Switch to Wet Food: Adding canned food or mixing water into dry kibble boosts moisture intake.
  3. Clean Bowls Regularly: Wash water bowls daily to prevent slime and bacteria buildup.