Indicative range and food moisture
Total ≈ 44–66 ml × kg; drinking water ≈ total − food grams × moisture %This is a broad starting range for healthy animals. Heat, activity, lactation, medication and illness can change needs considerably.
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HOW IT WORKS
A result to understand, not just read.
Total water intake includes both drinking water and the moisture contained in food. Two animals of the same weight may therefore drink very different amounts when one eats wet food and the other eats dry kibble.
OFFICIAL SOURCES
msdvetmanual.com↗FREQUENTLY ASKED QUESTIONS
Should I restrict water to the calculated amount?+
No. Fresh water should remain freely available. The estimate is not a maximum allowance.
When should a change in drinking be checked?+
A sudden or marked change from the animal’s normal pattern, especially with illness or behavioural changes, should be discussed with a veterinarian.
RESULT GUIDE
How to estimate total water intake for dogs and cats
A general weight-based range is used for total daily water, then the moisture supplied by food is subtracted to show an indicative drinking-water range.
Example: a 10 kg pet eating dry food
- weight: 10 kg
- food: 150 g per day
- declared moisture: 8%
Wet food can supply a substantial share of total water and reduce the amount seen disappearing from the bowl.
How to interpret the result
- A change from the pet’s own normal drinking pattern is often more informative than one rigid target.
- Measuring intake for several days can provide useful information for a veterinary consultation.
What the estimate does not include
- The calculator must never be used to ration water.
- It cannot assess dehydration, kidney disease, diabetes or another medical condition.
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