How Much Water Should a Dog Drink Each Day?
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Thirst is one of the earliest signs of several serious diseases, and one of the easiest to miss because few owners know what normal looks like. Measuring your dog's water intake for a week is a five-minute habit that can catch kidney disease, diabetes and hormonal problems months earlier.
Key Takeaways
- A healthy dog drinks roughly 50 to 60 ml per kilogram per day; a 20 kg dog, about a litre.
- Wet-fed dogs drink much less because their food is mostly water.
- A sustained rise in thirst without an obvious cause needs a vet visit.
What normal looks like
Intake rises with heat, exercise, salty treats and dry food, and falls on wet diets. Measure by filling the bowl from a jug of known volume and noting what is left over 24 hours, for several days, to get your dog's baseline.
Causes of increased thirst
Kidney disease, diabetes, Cushing's disease, uterine infection in unspayed females, high blood calcium and some medications, particularly steroids and diuretics. Urinating more often or having accidents indoors is the usual accompanying sign.
Causes of reduced drinking
Nausea, mouth pain, a dislike of the bowl or its location, and very wet diets. Dehydration shows as sticky gums, sunken eyes and skin that is slow to spring back when gently lifted.
When to see the vet
If intake exceeds about 100 ml per kilogram per day, if thirst has clearly increased over a week or two, or if increased thirst comes with weight loss, lethargy or changes in appetite. Bring your measurements; they are genuinely useful.
Frequently Asked Questions
?Should I limit water if my dog drinks a lot?
Never restrict water without veterinary advice. Increased thirst is usually the body compensating for something, and restriction can cause harm.
?Is it normal for puppies to drink more?
Puppies drink more per kilo than adults, especially while growing and when active. Sudden excessive thirst with frequent urination still warrants a check.
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About Dr. Tomas Ellery
Dr. Tomas Ellery is an emergency and general-practice veterinarian who has spent fifteen years treating dogs in busy city clinics. He writes the health and symptom guides on VetsExplained and is a firm believer that owners who know what normal looks like catch disease earlier.
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