Is my dog drinking enough? A practical water check

Water is essential for circulation, digestion, temperature regulation and metabolism. But how much should a dog drink, what changes are noticeable and how reliable are skin folds, gums and urine colour? With a simple drinking check you can get to know your dog's normal state.

The water bowl is available every day. Nevertheless, in everyday life it is often difficult to judge whether a dog is actually drinking enough. Some dogs visit the bowl frequently and only consume small amounts. Others rarely drink, but drink extensively. Food, weather, exercise, body weight and state of health also influence requirements.

The most important starting point is therefore not a single measurement, but rather your dog's personal normal state. If you know how much he usually drinks, what his gums look like, and how frequently he urinates, you'll notice changes more quickly.

As a rough guide, around 40 to 60 millilitres of water per kilogram of body weight per day is often given for dogs. Expert sources describe approximately 44 to 66 millilitres per kilogram for mammals in a comfortable environment. This is not a fixed target.

A dog weighing 20 kilograms can roughly consume around 800 to 1,200 millilitres of total water per day. The total amount also includes the moisture in the food. Wet food contains significantly more water than dry food. A dog that mainly gets wet food often drinks less from the bowl.

Water needs can increase with:

Fresh water should be freely available to a healthy dog at all times. Only restrict your dog’s water intake under veterinary guidance.

If your dog’s drinking behaviour seems unusual, you can monitor the amount over 24 hours. In the morning, fill a measured amount of water into all bowls. The next morning, measure what’s left. Add water that you refilled. You have to roughly take spillages into account.

If there are several animals in the household, an accurate measurement is difficult. Then it may make sense to observe them separately at times, as long as each dog has access to water at all times.

Also note:

A measurement on a single day may be biased by weather or activity. Several comparable days give a better picture.

Well-hydrated gums usually feel moist and smooth. Dry or sticky gums can indicate dehydration. Colour and moisture should always be assessed in good light and without force.

During the skin fold test, you carefully lift a small fold of skin in the shoulder area and release it again. In a well-hydrated dog, it usually smoothes out quickly. If it remains visibly raised, this could be a sign of dehydration.

This test is just an indication. The skin of very young dogs is particularly elastic. In old or very slim dogs, skin tension can be reduced even without a lack of fluids. Fur, connective tissue and body condition influence the result. Therefore, fluid status cannot be determined safely at home.

Light yellow urine is common in many healthy dogs. Significantly dark urine may be more concentrated, for example after a long night. But it can also occur due to a lack of fluids or illnesses. Reddish, brown, orange or unusually cloudy urine should be checked by a vet.

Even very light urine is not automatically optimal. If a dog drinks a lot and passes large amounts of very light-coloured urine, it could be due to kidney problems, diabetes or hormonal diseases, among other things.

Possible clues are:

If there are multiple warning signs, significant weakness or failure to drink water, your dog should be examined on the same day. Puppies, seniors and dogs with previous illnesses can get into a dangerous condition more quickly.

Not just too little water, but also significantly more water can be a warning signal. Measure the amount if the bowl suddenly empties much more quickly or your dog needs to drink at night. More frequent urination, house-soiling, weight loss, increased appetite or fatigue are important additional information.

Do not reduce the water on your own. Make an appointment and bring your notes with you. Blood and urine often provide crucial clues.

Your dog’s water intake is individual and depends heavily on food, weather and activity. Gums, skin folds and urine colour provide clues, but do not replace an examination. It is most helpful to know your dog's normal daily routine and to document any clear changes early on.