Fresh, cool water offered in small amounts is the safest and most effective thing you can give a dehydrated dog. If your dog won’t drink plain water, you can try unflavored Pedialyte diluted 50/50 with water, ice chips, or a low-sodium bone broth to encourage fluid intake. Most mild dehydration resolves within a few hours once a dog starts drinking again, but moderate to severe cases need veterinary care.
How Much Water Dogs Actually Need
A healthy dog drinking dry kibble typically consumes about 60 to 80 mL of water per kilogram of body weight each day. For a 20-pound (9 kg) dog, that works out to roughly 2 to 3 cups daily. Dogs eating wet food get a portion of their water from the food itself and may drink less from their bowl. On hot days, after exercise, or during illness, water needs can easily double.
How to Spot Dehydration
The quickest home test is the skin tent. Gently pinch and lift the skin between your dog’s shoulder blades, then release it. In a well-hydrated dog, the skin snaps back flat almost instantly. If it holds its shape for even a second or two before settling, your dog is likely dehydrated. Research shows that even mild dehydration (less than 1% of body weight lost as fluid) produces a visible change in skin turgor.
You can also check the gums. Press a finger against the gum above a canine tooth until the spot turns white, then release. In a healthy dog, color returns in about 1 to 1.2 seconds. If it takes closer to 2 seconds or longer, blood volume may be low.
More advanced signs include sunken eyes (caused by fluid loss in the fat pads behind the eyes), dry or tacky gums, and noticeable lethargy. A dog that has no interest in playing or moving and just lies around is conserving energy, which can signal that dehydration has progressed beyond what home treatment can fix.
Best Fluids to Offer at Home
Plain Water and Ice Chips
Start simple. Place a bowl of fresh, cool water near your dog. If they won’t lap from the bowl, try offering ice chips or small ice cubes to lick. Some dogs will accept water from a syringe (without the needle) gently squirted along the inside of the cheek. The key is small, frequent amounts. A dog that gulps a large volume at once after being dehydrated is more likely to vomit it back up.
Diluted Pedialyte
Unflavored Pedialyte mixed half-and-half with water can help replace lost electrolytes, especially if your dog has been vomiting or had diarrhea. Always use the unflavored version. Flavored Pedialyte often contains artificial sweeteners like sucralose, which dogs don’t metabolize the same way humans do and which can make them sick. Some human products also contain xylitol, which is outright toxic to dogs. Even unflavored Pedialyte contains natural sugar, so it’s not ideal for diabetic dogs since it can spike blood glucose levels.
Offer the diluted solution in small amounts rather than filling a whole bowl. Undiluted Pedialyte can actually cause diarrhea from electrolyte overload, which would make the dehydration worse.
Homemade Bone Broth
A plain bone broth can be very appealing to dogs that refuse water, and it provides both fluid and some minerals. You can make a dog-safe version by simmering raw marrow bones (beef, chicken necks, or turkey necks) in enough water to cover them by a few inches for 12 to 24 hours. Add a splash of apple cider vinegar to help draw minerals from the bones. Carrots and celery are safe additions.
The critical rule: no onions and no added salt. Many store-bought broths contain both, making them unsafe. Onions are toxic to dogs in any form or amount. If you’re buying premade broth, read the label carefully for onion powder, garlic powder, and sodium content. Cool the broth to room temperature before serving, and skim off the fat layer that forms on top.
What to Avoid
Gatorade and other human sports drinks are not recommended. They’re high in sugar and sodium compared to what a dog needs, and they contain artificial ingredients that can cause digestive upset. The electrolyte ratios are formulated for human sweat losses, not canine physiology, so the potential risks outweigh any benefit.
Why Dogs Get Dehydrated
Sometimes a dog simply hasn’t had enough access to water on a hot day, and the fix is straightforward. But dehydration is often a symptom of something else. Vomiting and diarrhea are the most common culprits because they cause rapid fluid loss that outpaces what a dog can drink. Parvovirus, a serious and highly contagious infection in unvaccinated dogs, causes severe vomiting and bloody diarrhea that can lead to life-threatening dehydration within hours.
Heatstroke is another major trigger. When body temperature rises dangerously high, the gastrointestinal lining can break down, compounding fluid loss. Chronic conditions like kidney disease and pancreatitis also lead to ongoing dehydration because they disrupt the body’s ability to retain water and electrolytes normally. If your dog is repeatedly dehydrated without an obvious explanation like heat or exercise, an underlying medical condition is likely.
When Home Treatment Isn’t Enough
Mild dehydration in an otherwise healthy dog that’s still alert and willing to drink usually responds well to the options above. But if your dog shows sunken eyes, extreme lethargy, persistent vomiting or diarrhea, has not eaten in 24 hours, or if the skin tent holds its shape for several seconds, professional treatment is needed.
At the vet, dogs with moderate to severe dehydration typically receive fluids either under the skin (subcutaneous) or directly into a vein (intravenous). Subcutaneous fluids are common for mild to moderate cases and can sometimes be administered at home once a vet demonstrates the technique. IV fluids are reserved for severe dehydration or when a dog is too sick to absorb fluids through other routes. Both methods are effective at restoring hydration, though oral rehydration (drinking) actually restores fluid balance faster than either injection method when a dog is able and willing to drink.
Helping Your Dog Drink More
Prevention matters more than treatment. Make sure fresh water is always available, especially in warm weather. Bring a collapsible bowl on walks. If your dog is a reluctant drinker, adding a small splash of low-sodium broth to their water bowl can make it more appealing. Dogs eating exclusively dry kibble need to drink significantly more than those on wet food, so consider mixing some water into their meals.
After exercise, offer water in small amounts every few minutes rather than letting your dog tank up all at once. Even 15 minutes of vigorous activity can cause measurable fluid loss, so don’t wait until you get home to offer a drink.