How Long Can a Dog Go Without Water?

Wondering how long can a dog go without water? Most likely your dog is treating his water bowl like a favourite café. Yes, he does drink, but he does so casually, taking an occasional sip before wandering off as if hydration is the least interesting part of the day.

In the case of a dog not drinking water though, you need to be cautious: dogs can dehydrate quickly, and there are important considerations to keep in mind.

Key Takeaways

• A dog's ideal daily intake of water will vary based on several factors.
• Pet parents should learn how to identify early signs of dehydration.
• Puppies and old dogs are more at risk to get dehydrated quickly.
• Dogs lose a lot of water when they have persistent episodes of vomiting and diarrhea. Not drinking enough to compensate for the fluid loss risks complications.
• Dogs being fed canned foods may drink less, considering their high moisture content.

A dog on a water bowl strike raises an understandable question: how long can a dog survive without water? This is an important one.

In general, you do not need to worry about how long a dog can live without water if you forgot to fill the bowl before you left for work, or got stuck in a traffic jam when you visited Aunt Nelly.

Normally, dogs can go without water for 6 to 10 hours without becoming dehydrated, according to All Creatures Big and Small, an animal hospital based in Fairfield, New Jersey.

Can a Dog Go 8 Hours Without Water?

Pet parents who work full time sometimes ask: can a dog go 8 hours without water? It's true that a healthy dog can go 8 hours without water, but this doesn't mean he should. Dogs should always have access to fresh water.

Many healthy dogs naturally go several hours between drinks, especially resting indoors. They should still be able to drink whenever they feel thirsty, exactly as we do.

How Long in a Crate Without Water?

Dog parents who recently adopted a puppy or an adult dog who is not potty trained also frequently ask: how long can a dog be in a crate without water?

Pet parents who ask me this get the same answer: it varies based on several factors. In general, I feel that a dog crated for a short period, such as when you're in another room and cannot actively supervise him, doesn't need a water dispenser in the crate.

Similarly, you may not need to place a water dispenser in the crate during the night if you're at home too. But leaving for work while your dog is crated for several hours means fresh water should be readily available.

Deciding Whether to Leave Water in the Crate

Several variables matter here: your dog's age, the ambient temperature, and his health. Puppies, senior dogs, and dogs with medical conditions tend to become dehydrated faster, and so do dogs exposed to warm weather or dogs prone to being anxious.

Getting that crate-and-potty rhythm right is training rather than guesswork. Answer a few questions about your dog and PawChamp builds the housetraining schedule around him.

A dog not drinking water is obviously concerning, and you may feel determined to put on your investigative hat to figure out why. An issue that persists is ultimately your vet's job to investigate. Possible reasons a dog won't drink water include the following:

Each of these deserves more than a line. Our guide to a dog not drinking water unpacks the causes and what actually gets a dog drinking again.

Common Reasons a Dog Won't Drink

• Medical causes: tooth or mouth pain, nausea, difficulty swallowing, trouble walking to the water bowl, medications causing lethargy.
• Emotional causes: fear, anxiety, phobias, stress after moving, separation-related distress, routine changes, conflict with another dog, fear of the water bowl.
• Environmental causes: dirty water bowl, changes in water flavour, noises near the water bowl, a bowl placed in a high-traffic area, a novel type of bowl, noisy collar tags hitting the metal bowl, reflections seen on the metal bowl.
• Dietary reasons: this is often the case when dog parents ask why is my dog not drinking water but eating. Foods higher in moisture content will reduce drinking.
• Age-related reasons: older dogs with reduced mobility, puppies being easily distracted.
• Weather changes: cooler temperatures, reduced activity levels.

A dog off both water and food is a different problem — see how long a dog can go without eating.

Puppy Not Drinking Water: What to Know

A puppy not drinking water can be concerning, since puppies tend to dehydrate quickly. It's therefore important to seek veterinary help quickly when they are not drinking properly, especially when accompanied by signs of illness. But what would cause young pups to turn up their nose at water? Following are some possibilities:

• The puppy was recently weaned. A young puppy used to nursing may not be attracted to drinking water right away.
• Being fed canned food or fresh foods with high moisture content.
• Being anxious or distracted, from moving to a new home to overexcitement or being too focused on playing.
• Not finding the water bowl. To a small puppy, a home can be very big and confusing.
• Teething discomfort. A teething puppy may have sore gums, which makes drinking water feel uncomfortable.
• Illness: puppies may not drink because they are nauseous, have tummy problems or are feeling weak.

Sick Dogs That Won't Drink Water

A dog not drinking because of an illness raises the question: how long can a dog go without water when sick?

The answer is that it depends, however a sick dog should not go without water for too long. A healthy dog may tolerate 48 to 72 hours without water under ideal conditions, but being sick changes the whole picture.

Fever, vomiting, diarrhea and reduced appetite all make dogs more susceptible to dehydration — and an upset stomach is often where it starts. Even a dog taking some sips of water may not be replacing the fluid lost.

Priority should therefore shift from how long a sick dog can survive without water to identifying the underlying cause of the illness.

Now that you are aware of several reasons why dogs won't drink, the next question is: how to encourage a dog to drink water?

The good news is that in general you can easily stimulate your puppy or dog to drink more. The University of Minnesota offers several tips on how to make a dog drink water:

• Always provide easy access to fresh, clean water
• Install a pet water fountain
• Feed foods rich in moisture
• Provide flavoured water to entice your dog to drink, by adding 1 teaspoon of their favourite canned food per cup of water
• Soak dry food in water, one cup of water per cup of dry food

Most of these only work if they happen consistently, which is the part that slips. PawChamp turns water breaks into a fixed part of the daily routine alongside meals, walks and rest, so drinking stops depending on whether you remembered.

Hydration for Small Dogs and Puppies

Dogs come in a vast array of shapes and sizes, and it comes natural to wonder how long can a small dog go without water?

A healthy adult small dog can generally survive for up to 2 to 3 days without water, but can start developing signs of dehydration within 12 to 24 hours, especially if the weather is warm or the dog is active.

Why do small dogs struggle more than larger dogs? Small dogs have less body mass and lower fluid reserves, making them more susceptible to dehydration. They can also lose water more quickly through panting — which is why hot weather compounds it — or through diarrhea, vomiting, fever, or vigorous exercise.

Puppies in particular are more susceptible to dehydration than adult dogs. A puppy not drinking water therefore warrants more urgent care than an adult dog, especially if it is accompanied by vomiting, diarrhea, or lethargy.

How long can a dog go without food and water? Dogs can generally go longer without food than without water, but combining the two makes the situation more risky. Dehydration develops much faster than starvation, and a dog deprived of both can become critically ill within just a few days.

Seek veterinary help promptly should your dog refuse both food and water for more than 24 hours, or sooner if accompanied by other symptoms such as vomiting, diarrhea, weakness, or lethargy.

Knowing how long a dog can go without water is important, but preventing dehydration in the first place boils down to establishing consistent daily habits.

PawChamp helps you build healthy routines that make regular water breaks part of everyday life:

• Step-by-step training plans that establish predictable crate, mealtime, potty, exercise and rest schedules, which naturally encourage your dog to drink throughout the day.
• Progress tracking, so you spot changes in your dog's habits early.
• The Ask a Dog Expert chat for when your dog suddenly refuses water and you're unsure whether it's a temporary issue or something that warrants closer attention.

Not sure which of those two you're dealing with? PawChamp's Pet Health & Care advisors can talk it through with you, though anything urgent still goes straight to your vet.

References

• College of Veterinary Medicine, Minnesota Urolith Center: How to increase water intake in pets.

• All Creatures Big and Small: How long can a dog go without water? Fairfield, New Jersey.