Water is the most important nutrient for any living being, and dogs are no exception. Adequate hydration is fundamental for kidney function, digestion, body temperature regulation and the correct functioning of every cell in the body.
However, many owners do not pay sufficient attention to how much water their dog drinks. And when they do, they often do not know whether the amount is sufficient or not. This guide gives you the keys to understanding your dog's hydration needs and how to ensure they are always well hydrated.
How much water does a dog need per day?
As a general rule, a dog needs approximately 50-70 ml of water per kilogram of body weight per day. So a 10 kg dog should drink between 500 and 700 ml daily.
This figure varies depending on:
- The type of diet (those who eat wet food drink less water from the bowl)
- Ambient temperature and the time of year
- The level of physical activity
- Age (puppies and seniors may have different needs)
- Health status (fevers, diarrhoea or vomiting increase the need for water)
It is not necessary to measure water to the millilitre. The important thing is that they always have free access to fresh, clean water, and that you can identify when something changes.
Signs of dehydration in dogs
Mild symptoms
- Dry or slightly sticky gums
- Reduced skin elasticity (skin fold test)
- Lethargy or lower than usual energy
Moderate-severe symptoms
- Sunken eyes
- Very dry mouth
- Vomiting or diarrhoea (which in turn worsen dehydration)
- Rapid, weak pulse
The skin fold test is simple: gently pinch the skin on the neck or between the shoulder blades. If the skin returns quickly to its position, hydration is correct. If it takes more than 2 seconds to return, there may be dehydration. In the case of severe symptoms, a visit to the vet is urgent: severe dehydration requires intravenous fluid therapy.
Factors that influence water intake
Type of diet
Dogs fed on dry kibble drink significantly more water than those that eat wet food or a natural diet. Dry kibble contains around 10% moisture, while wet food can exceed 70-80%. If your dog eats dry food, it is even more important to ensure water is always available.
Temperature and exercise
In summer or after intense exercise, water intake can double or triple. Do not restrict access to water after running, although it is advisable to avoid your dog drinking very suddenly and in large quantities all at once.
Age
Puppies are more prone to dehydration due to their active metabolism and lower capacity for temperature regulation. Senior dogs, on the other hand, may have a reduced sense of thirst, which means closer monitoring is needed.
Stress or environmental changes
Some dogs drink less when they are anxious, in an unfamiliar place or when the bowl has changed position. This is more common than it might seem.
How to encourage your dog to drink more water
If your dog does not drink enough, here are some strategies that work:
- Change the water several times a day: fresh water is more appealing.
- Use a fountain-style water bowl: many dogs prefer moving water.
- Place several bowls in different areas of the home.
- Add a little salt-free, onion-free stock to the water to make it more appealing.
- Incorporate wet food or add water to dry kibble.
- Clean the bowl daily: accumulated biofilm can put them off drinking.
Can a dog drink too much water?
Yes, and this also deserves attention. Polydipsia (excessive water intake) can be a sign of:
- Diabetes mellitus
- Kidney disease
- Cushing's syndrome
- Urinary tract infection
- Side effects of certain medications
If you notice your dog drinking compulsively or much more than usual, and this is accompanied by increased urination, weight loss or behavioural changes, consult your vet.
Hydration and diet: a direct relationship
Diet greatly influences hydration. Kibble made with quality natural ingredients — without excess salt or additives — contributes to more balanced kidney function. Recipes with salmon oil, vegetables and fresh meat provide internal hydration through the ingredients themselves.
At OnlyFresh you will find options such as the brands Harper and Bone, Amanova and TrovetPlus, formulated with high-quality ingredients and without unnecessary additives, designed to promote the overall wellbeing of your dog, including their renal and hydration health.
