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Water: The Most Underestimated Nutrient

We talk about proteins, fats, vitamins. But the **most important** nutrient for dogs is **water**.

Reality:

  • A dog can live **days without food**.
  • **It cannot live 48 hours without water**.
  • **5% dehydration** = serious problems.
  • **15% dehydration** = death.

Yet, many owners do not know **how much water** their dog should drink. Let's take a look.

The Exact Formula

Basic water requirement for a dog:

40-60 ml of water per kg of body weight per day.

Practical example:

  • Dog weighing **5 kg** → 200-300 ml/day.
  • Dog weighing **10 kg** → 400-600 ml/day.
  • Dog weighing **20 kg** → 800-1,200 ml/day.
  • Dog weighing **30 kg** → 1,200-1,800 ml/day.
  • Dog weighing **40 kg** → 1,600-2,400 ml/day.

**Range** depends on:

  • Diet (wet vs dry).
  • Physical activity.
  • Ambient temperature.
  • Age.

Factors That Increase Water Requirements

1. Dry Diet (Kibble)

Kibble contains **6-10% water**.

Fresh meat/wet food contains **70-80% water**.

A dog on kibble: needs to drink **much more**.

A dog on wet food: already hydrated from food, drinks less.

2. Ambient Temperature

Hot summer:

  • Requirement increases by 50-100%.
  • Dog dissipates heat through panting.
  • Significant water loss.

Winter:

  • Base requirement.
  • Sometimes slightly reduced.

3. Physical Activity

Inactive dog: base requirement.

Active dog (long walks, sports):

  • +20-50%.

Sporting dog (agility, mantrailing, working):

  • +50-100%.

4. Age

Puppies:

  • More water per kg (growth).

Adults:

  • Standard requirement.

Senior dogs:

  • Often drink less spontaneously.
  • Require stimulation.

5. Health Status

Conditions that increase requirements:

  • Kidney failure.
  • Diabetes.
  • Cushing's syndrome.
  • Hyperthyroidism (rare in dogs, common in cats).

A dog suddenly very thirsty = veterinary check-up.

6. Pregnancy/Lactation

Pregnant or nursing females:

  • Requirement **doubled**.

How to Monitor Water Intake

Practical Measurement

Step 1: Fill the bowl with a measured amount (e.g. 500 ml).

Step 2: After 24 hours: measure the remainder.

Step 3: Calculate: 500 ml - remainder = consumed.

Step 4: Compare with requirements.

Apps and Smart Devices

Smart bowls:

  • Weigh the water.
  • App tracking.
  • Alert if drinking too much/little.

Cost: 50-150 €.

Useful for: senior dogs, dogs with conditions.

Signs of Dehydration

Skin test:

  • Gently lift the skin where the collar sits.
  • Release.
  • Normal: returns immediately.
  • Dehydrated: returns slowly.

Other signs:

  • Dry gums (normal: pink and moist).
  • Prolonged dry nose.
  • Sunken eyes.
  • Thick saliva.
  • Listlessness.
  • Lack of appetite.

Severe dehydration:

  • Very taut skin.
  • Signs of shock.
  • URGENT veterinary attention.

Signs of "Drinking Too Much"

Excessive drinking (**polydipsia**) can be a sign of:
  • **Diabetes**.
  • **Kidney failure**.
  • **Cushing's syndrome**.
  • **Diabetes insipidus** (rare).

Definition: drinking >100 ml/kg/day.

A 10 kg dog drinking 1.5 liters a day: investigate.

How to Encourage Drinking

Strategies for Dogs That Drink Little

1. Multiple Bowls:

  • More water points in the house.
  • Higher likelihood of passing by.

2. Fresh Water:

  • Change 1-2 times a day.
  • Never stagnant water.

3. Water Fountain:

  • Running water = more appealing.
  • Brands: Catit, PetSafe.
  • 30-80 €.

4. Unsalted Chicken Broth:

  • Adds flavor.
  • Increases intake.

5. Broth Cubes:

  • Hydrating snack.

6. Wet Food:

  • Adds water through feeding.

7. Natural Sparkling Water:

  • Some dogs love the fizz.
  • Appropriate fountain placement.

Summer Strategies

Summer:

  • Water **always available**.
  • Ice cubes (some dogs love them).
  • Bowls in shaded areas.
  • Water bottle on walks.

The Quality of Water

Tap Water

Generally safe in Italy.

Any precautions:

  • Let sit for 30 min to dissipate chlorine.
  • Check the water quality in your area (some municipalities have problems).

Filtered Water

For sensitive dogs:

  • Specific filters.
  • Remove chlorine, limescale.

Bottled "Mineral" Water

Expensive:

  • Not necessary for healthy dogs.
  • May be needed for travels abroad (unknown water).

Spring Water

On walks:

  • Water from public fountains: okay.
  • Stagnant water (puddles): danger (leptospirosis).
  • Running mountain water: generally okay.

The Right Bowls

Materials

Stainless steel:

  • More hygienic.
  • Easy to clean.
  • Durable.

Ceramic:

  • Heavy (does not tip over).
  • Aesthetic.
  • Needs thorough cleaning.

Plastic:

  • Inexpensive.
  • Not recommended: scratches easily, accumulates bacteria, some dogs develop "acne".

Sizes

Small dog: 250-500 ml.

Medium dog: 500-1,000 ml.

Large dog: 1,500-2,500 ml.

Giant dog: 3,000+ ml.

Position

Always available:

  • Multiple water points.
  • Away from food bowl (for some dogs).
  • At a comfortable height (large dogs: elevated).

Breeds at Greater Risk of Dehydration

Brachycephalic (Bulldogs, Pugs, Bouledogues):

  • Panting less efficiently.
  • Heat up quickly.

Large/Giant breeds:

  • Higher needs.

Nordic breeds (Huskies, Malamutes):

  • Struggle greatly in heat.

Puppies and seniors:

  • More vulnerable.

What to Do in Case of Dehydration

Mild (5%)

  • Water in small sips.
  • Possible electrolyte water (Pedialyte).
  • Shade, cool.
  • Rest.
  • Monitoring.

Moderate-Severe (>5%)

  • Veterinary assistance immediately.
  • Subcutaneous fluids.
  • Possible intravenous fluids.

Never

  • Force large amounts of water all at once (vomiting).
  • Cold water (shock).
  • Wait too long (worsens quickly).

Myths to Debunk

Myth 1: "Dogs know how to regulate their water intake alone".

Partially true: but not always. Seniors, puppies, sick dogs do not.

Myth 2: "Kibble contains enough water".

False: 6-10%, insufficient. Bowls are needed.

Myth 3: "Milk is better than water".

False: dogs lactose intolerant.

Myth 4: "Cold water is better in summer".

False: thermal shock.

Myth 5: "A dog is perfectly fine drinking little".

False: often chronic dehydration.

The Truth

Water is the **most important nutrient**.

Daily routine:

  • ✅ Multiple bowls.
  • ✅ Fresh water changed 1-2 times/day.
  • ✅ Measured amounts occasionally.
  • ✅ Water bottle on walks.
  • ✅ Summer = maximum attention.

Investment:

  • Stainless steel bowls: 20-50 €.
  • Water fountain: 50-100 €.
  • Water bottle: 10-20 €.

Benefit: healthy dog, protected organs, long life.

And remember: a hydrated dog is a happy dog. Often the first health signal is indeed **good hydration**.

Water, always. Water, fresh. Water, accessible.

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