As pet parents, it is our responsibility to take care of our dog’s nutritional needs and to make sure that they are getting fed on time every day. But you may have seen that at times dogs refuse to touch their food and do not eat anything at all for the whole day. During these times have you ever wondered how long can a dog can go without eating before you should start worrying? After all, dogs can’t open the fridge and make themselves a snack when they get hungry.

You will be surprised to know that while most dogs should eat regularly to stay healthy, they can also go on for a long time without food. Of course, this varies based on factors like age, size, and overall health.

If you want to know more about how long can a dog go without eating or drinking, then this article is for you. We will talk about the feeding habits of dogs, how long can a dog go without eating, and the possible reasons why a dog may not be eating.

How Long Can Dogs Go Without Eating?

How Long Can Dogs Go Without Eating_

How long can a dog go without eating before it becomes a concern? As a general rule of thumb, most dogs can go without eating for 2-3 days before it starts to affect them. However, there are a few factors to consider:

Age and size:

Puppies, especially toy-breed puppies, have faster metabolisms and smaller stomachs so they need to eat more frequently. Large breed or senior dogs can usually go a bit longer without eating.


Dogs with underlying health conditions like diabetes or gastrointestinal issues may need to eat more regularly. It’s best to follow your vet’s recommendations based on your dog’s condition.

Access to water

As long as your dog has access to fresh, clean water they can go longer without eating. A lack of water will dehydrate your dog much faster than a lack of food.


Dogs in hot weather or doing strenuous activity will need to eat more often to maintain healthy blood sugar levels and hydration.


Some dogs just have bigger appetites and higher food drives, so they may start acting hungry or begging for food sooner. Pay attention to your dog’s usual habits and behavior.

If your dog hasn’t eaten for more than 2-3 days, it’s best to call your vet, especially for young puppies or dogs with medical issues. While healthy dogs can survive for weeks without food, that doesn’t mean it’s good for them. Your dog relies on you to provide nutritious food every day to stay happy and healthy.

Factors That Affect How Long a Dog Can Go Without Food

Factors That Affect

How long your dog can go without eating depends on several factors, including:

Size and age

Smaller dogs and puppies have higher metabolisms and less fat stores, so they can only last a couple of days without food. Larger breeds and senior dogs have more fat to burn, so they can go 3-5 days.


If your dog is sick or has an underlying condition, their body will burn through energy reserves faster. It’s best to consult your vet, but a ill dog may only last 12-24 hours without eating.

Activity level

The more active your dog is, the more calories they need to sustain themselves. Inactive or less active dogs have lower energy needs so can go longer without food.

Access to water

Having access to fresh water is critical. Without it, a dog can suffer dehydration and organ damage in just a couple of days. Always provide your dog with water, even when withholding food.

Environmental temperature.

In hot or cold weather, a dog’s body has to work harder to regulate temperature which uses more energy. So they may only last a day or two without food in extreme heat or cold.

    The bottom line is if your dog hasn’t eaten for 24-48 hours, contact your vet. Puppies, small or ill dogs should be checked sooner. While healthy dogs can survive for a few days without food, their well-being starts to suffer quickly. It’s always best to get your dog eating as soon as possible to avoid potential health issues.

    Signs Your Dog Is Hungry and Needs to Eat

    Signs Your Dog Is Hungry and Needs to Eat

    If your dog isn’t eating for some reason, it’s important to watch for signs that they need food. Some clues your pup may be getting hungry include:

    • Whining or barking, especially around their normal feeding time. Your dog has come to expect meals at certain times of day, so they may vocalize when that time passes and their bowl remains empty.
    • Pawing at their food bowl or the area where you usually feed them. This is your dog’s way of telling you they’re ready to eat and wondering where their meal is.
    • Restlessness or pacing. Hunger can make your dog feel unsettled, causing them to wander around looking for food.
    • Licking their lips frequently. This instinctual behavior shows your dog is thinking about eating.
    • Loss of energy or interest in activities. If your dog seems more lethargic than usual and doesn’t want to go for walks or play, it could be a sign their energy levels have dropped due to lack of food.

    The longer a dog goes without eating, the more severe these symptoms may become. As a general rule, dogs can survive for up to 5 days without food, but you should still take your dog to the vet right away if they show signs of starvation like weakness, vomiting, diarrhea or collapse. It’s always better safe than sorry in these situations.

    The best approach is to stick to a regular feeding schedule for your dog and provide them with a consistent source of nutrition to keep their energy levels up and metabolism working properly. But if your dog does stop eating for some reason, watch them closely for clues that it’s time for their next meal.

    Dangers of Your Dog Not Eating for Extended Periods 

    Dangers of Your Dog Not Eating for Extended Periods 

    Dogs cannot go for extended periods without eating before it becomes dangerous for their health. After a day or two without food, your dog is at risk of:


    Low blood sugar can occur quickly in dogs that haven’t eaten, especially for smaller breeds. Signs include lethargy, weakness, and confusion. To treat, rub honey or syrup on the gums and give small amounts of bland food like rice and chicken.


    Without food, your dog won’t get enough water either. Dehydration is life-threatening and can cause dry nose and gums, sunken eyes, lethargy, and skin that stays tented when pinched. Provide IV fluids under vet supervision for severe dehydration.

    Liver damage

    The liver stores nutrients and provides energy when a dog isn’t eating. After 3-5 days without food, the liver can suffer permanent damage or even failure. Vomiting, diarrhea, jaundice and blood in the stool can indicate liver problems. Seek vet care immediately.

    Electrolyte imbalance

    Important minerals like sodium and potassium are depleted when a dog doesn’t eat. This disrupts fluid balance, nerve and muscle function. An imbalance can lead to weakness, collapse and seizures. IV fluid therapy and electrolyte supplements may be needed.

    Not eating for a few days may seem minor, but the health impacts on your dog can be severe. Contact your vet right away if your dog shows symptoms of malnutrition or dehydration, or hasn’t eaten for 3-5 days. They can check for any underlying issues, provide necessary treatments and help get your dog back to full health. The sooner you act, the better for your dog’s wellbeing and recovery.

    What to Do if Your Dog Stops Eating

    If your dog stops eating for more than a day or so, it’s time to call the vet. There are several possible reasons why your dog may go off their food, and some can be quite serious.

    What to Do if Your Dog Stops Eating

    When to Call the Emergency Vet Immediately

    Take your dog to an emergency vet’s clinic right away if:

    • Your dog hasn’t eaten or drank anything for 2-3 days. Dehydration and low blood sugar can become life-threatening.
    • Your dog is vomiting or has diarrhea in addition to loss of appetite. This can lead to dangerous dehydration or electrolyte imbalances.
    • Your dog seems lethargic or weak. Lethargy can be a sign of an underlying medical issue that requires quick treatment.
    • There are many other alarming symptoms like seizures, difficulty breathing, or pale gums.

    When to Call Your Regular Vet

    If your dog hasn’t eaten for 24-48 hours but is otherwise acting normally, call your regular vet. Some possible causes for loss of appetite that your vet may check for include:

    • Digestive issues like pancreatitis, intestinal parasites, or dietary indiscretion (eating something they shouldn’t have)
    • Pain from an injury or condition like arthritis that makes eating uncomfortable
    • Infection of some kind
    • Liver or kidney disease
    • Cancer or other illness

    Your vet can examine your dog, run blood tests or other diagnostics if needed, and determine the cause of the loss of appetite so they can recommend appropriate treatment to get your dog eating again. The sooner you call, the sooner your vet can get your dog on the road to recovery and prevent potential complications from lack of food.

    With prompt veterinary care, most dogs will start eating again within a day or two of treatment. But anytime a dog’s appetite remains low for more than a couple of days, it’s best to consult your vet to be safe. Your dog’s health and nutrition should be a top priority, so call right away if anything seems off.

    Why is your dog not eating: Possible causes and reasons

    Why is your dog not eating

    There are several possible reasons why your dog may go off their food.

    Medical issue

    If your dog suddenly stops eating for more than a day, it could indicate an underlying medical problem and you should take them to the vet. Conditions like gastrointestinal issues, dental problems, kidney disease, or other illnesses can cause loss of appetite in dogs. It’s best to rule out any medical causes first before assuming it’s due to something else.

    Stress or anxiety

    Is there a new person or animal in the household? Have you recently moved to a new home? Stress and anxiety are common reasons for dogs to skip meals. Try giving your dog some extra love and reassurance to help relieve their stress. You can also try interactive dog toys to keep them stimulated.


    Some dogs lose interest in their food simply because they’re bored. Switching up your dog’s mealtime routine can help. Try feeding them with interactive dog toys that make them work for their food, or give them puzzle toys that dispense treats. You can also try changing the location of where they eat. Simple changes can make mealtimes exciting again.

    Picky eater

    If your dog is otherwise healthy, they may just be a picky eater. You can try warming up their food, switching to a more enticing diet, or adding extras like chicken broth, eggs, or wet food to their kibble to make it more appealing. Giving your dog some tough love by sticking to scheduled feeding times can also help address picky eating. Don’t give in by offering lots of treats or table scraps!

    With patience and possibly the help of your vet, you can get to the bottom of why your dog’s appetite has changed and get them back to enjoying mealtimes again.


    So there you have it, everything you need to know about how long your dog can go without eating. The short answer is that for a typical healthy adult dog, you should not let them go without food for more than 48-72 hours. Puppies, senior dogs, and dogs with medical issues have different needs, so check with your vet for their specific recommendations.

    While fasting for short periods is usually fine and even has some benefits, extended periods without food can be dangerous for dogs. If your dog hasn’t eaten for over 2 days for any reason, call your vet right away. They’re a member of your family, so make sure to keep a close eye on their eating and drinking habits and get them checked out if anything seems off. Your dog depends on you, so go give them some love – and maybe a treat, they deserve it!

    More From The Petsmagazine:

    What is your reaction?

    In Love
    Not Sure
    shreyasi datta
    Meet Shreyasi with her 7-year experience as a responsible pet parent to a handsome Golden retriever, who she claims is the 'love of her life.' Found with her nose buried deep in research when she’s not discussing The Crown, you can trust her to answer your queries as a first-time pet parent! From possible signs of canine diseases to finding the best supplement for your fur baby, Shreyasi has an answer for all things dogs! Her dedication towards canine wellness, irrespective of the breed, is worthy of a PhD in Canine Companionship!

      You may also like

      Leave a reply

      Your email address will not be published. Required fields are marked *