The Complete Science of Pet Hydration

Hydration supports circulation, temperature control, digestion, and organ function. A practical baseline is ~60–70 mL/kg/day for dogs and ~50 mL/kg/day for cats. Real needs vary widely with activity, diet moisture, environment, age, and breed traits.

Maintenance vs. Deficit

Maintenance covers daily needs at steady state. A deficit occurs with dehydration from heat, illness, or inadequate intake; it’s typically corrected over 12–24 hours unless shock is present.

Diet Moisture

Wet food can supply a large portion of daily water; dry-only diets push intake to bowls. Transition slowly and speak with your vet for health conditions.

Environment & Activity

Heat, humidity, aridity, and altitude change evaporative and respiratory losses. On active days, increase access and offer small, frequent sips.

Use the Hydration Tracker to spot trends and bring data to vet visits.

Educational use only. If you’re concerned about your pet’s health, contact your veterinarian.