Why Is My Dog Throwing Up Undigested Food Hours After Eating? (Best Guide)

Dogs are very smart animals. They can recognize their owners’ voices, smell, taste, and even sense emotions.

Unfortunately, they also have a tendency to eat things they shouldn’t. This is why dogs often get sick from eating too much or ingesting foreign objects.

Dogs don’t digest food properly because they lack the enzymes necessary to break down proteins and fats.

If your dog eats something that contains these nutrients, his body will try to absorb them through the lining of his stomach.

The problem is that the lining isn’t strong enough to withstand the pressure of digestion. As a result, the food passes through the digestive system without being broken down.

So, if you are wondering why your dog sometimes throws up undigested food, just a few hours after eating it, you are in the right place. Keep on reading to find out more!


Is It Normal For Dogs To Throw Up?

The first thing you should do if your dog throws up undigested food is to make sure it’s not just an isolated incident. You may be able to prevent this by making sure he only has certain foods.

However, if you’re not sure what caused him to throw up, then there’s nothing wrong with taking him to see a vet.

What Should I Do If My Dog Throws Up?

If your dog throws up after eating, here are some things you should consider:

  • Make sure he hasn’t eaten anything else since the last time he threw up.
  • Check for any signs of illness in your dog such as diarrhea, vomiting, lethargy, fever, or loss of appetite.
  • Ask yourself whether your dog ate something unusual recently. Was he given a new diet or did he eat raw meat or bones?
  • Consider whether he might have swallowed a hairball. These are small pieces of fur that form inside the intestines.
  • Try giving him a bland-tasting liquid like water or milk instead of solid food.
  • Be careful when cleaning out your dog’s bowl. Don’t use soap or detergent on the floor where he eats. Instead, wipe the bowl clean using paper towels or wipes.
  • Give your dog plenty of fresh air and exercise. He’ll feel better once he gets moving again.

How Can I Prevent My Dog From Throwing Up?

Why Is My Dog Throwing Up Undigested Food Hours After Eating

There are several ways to help keep your dog healthy. Here are some tips to help prevent him from throwing up:

  • Feed him smaller meals more frequently throughout the day.
  • Keep his bowls away from areas where he spends most of his time.
  • Avoid feeding him table scraps.
  • Avoid giving him food high in fat content including fatty meats, cheese, butter, cream, and ice cream.
  • Limit the amount of salt he consumes.
  • Use a water bottle rather than a bowl when he drinks.
  • Keep his environment free of clutter, so he doesn’t choke on toys or other items.
  • Never leave your dog unattended while he’s eating.
  • Keep all kitchen utensils and appliances clean.
  • Clean his teeth regularly.
  • Brush his coat daily to remove dead skin cells.
  • Bathe him at least twice weekly to remove dirt and debris.
  • Take him to the veterinarian regularly for checkups.

Dog Food Recipes – How To Cook Your Dog’s Diet

A lot of people think that cooking their dogs’ food is too complicated, but it really isn’t.

All you need to know is how much protein, carbohydrates, and fats you want your dog to consume each week.

This article shows you how to cook your dog’s diet using simple recipes.


To determine the amount of protein you need to feed your dog, divide your dog’s weight in kilograms by 20.

So, if your dog weighs 10 kg (22lb), you would multiply 10 by 0.2 2.0.

You can now add this figure to the total number of grams of protein per kilogram of body weight.

In our example, we’ve calculated that your dog needs 8g of protein per kg of body weight.


The easiest way to calculate the carbohydrate requirement of your dog is to take the total number of calories you want your dog to eat each week and then divide it by 4.

For example, if you want your dog to be fed 3,000 calories each week, you’d divide 3,000 by 4. You get 775 calories per week.

Now you just need to multiply this figure by 1.5 to account for the fact that half of the calories will come from carbs.

That means your dog should be consuming 1,125 grams of carbohydrates per week.


The same method applies to calculating the fat requirements of your dog as with carbs.

If you want your dog to receive 3,000 calories per week, you’d divide this figure by 9.3. You end up with 333 calories per week.

Multiply this figure by 4 to find that your dog should be consuming 666 grams of fat per week.

Is There A Difference Between Vomiting And Regurgitating?

Vomiting is when the stomach produces acid or bile and pushes it into the throat.

Regurgitation is when the stomach produces food but doesn’t push it into the throat. Dogs who vomit often do it because they feel sick. They might also vomit if they eat too fast or if they’re full.

Regurgitated food looks like the food you fed your dog. It doesn’t go into your dog’s stomach, but instead goes back up again. Your dog might eat this food if he was starving.

Vomiting is a sign of sickness in dogs. When a dog vomits, you may notice him drooling, acting apprehensive, tensing up, making loud gurgling sounds, and sometimes regurgitating partially digested food.

Vomit usually contains acidity, but if it doesn’t, then the dog may have been eating something that was too rich in protein.

Regurgitation is more likely caused by an upset stomach, but it could also mean that the dog ate something that wasn’t digestible.

What Is Undigested Food?

Undigested food is any food that has not gone through the digestive system yet.

Some foods are easier to digest than others. Meat, fish, eggs, dairy products, vegetables, fruits, nuts, seeds, grains, beans, peas, lentils, tofu, and other soy-based products are all easy to digest.

However, many processed foods such as breads, cereals, and pasta are difficult to digest.

Why Is My Dog Throwing Up Undigested Food Hours After Eating?

Why Is My Dog Throwing Up Undigested Food Hours After Eating

Let’s delve into the possible causes of your dog throwing up undigested food.

Stomach Upset

Dogs vomit after eating bad food. It could be as simple as the food not agreeing with your dog’s stomach.

Sometimes, dogs get sick if they eat too much junk food, or too many treats, or they switch diets suddenly. These issues usually resolve within 24 to 72 hours.


Dogs throw up bile at night because they’re digesting food too quickly.

When dogs eat, they may vomit later than usual. That happens because dogs’ stomachs are moving backward instead of forward.

Vomiting food several hours after eating is common in dogs who suffer from reverse motility.


Vomiting is caused by an upset stomach due to the new diet. Diarrhea may also occur due to unknown foods.

Dogs have a sensitive stomach, and they may be sensitive to changes in their diet, hence why they could throw up.

Inflamed Bowels

Vomiting is often caused by inflammation of the stomach lining. Sometimes it is due to an infection. Dogs with inflammatory bowel disease (IBD) may vomit, but not always.

There are many types of IBD. Some dogs may just have a mild form. Others may have a more severe form.


Gastric outflow obstruction occurs when the pylorus (the outlet) of the stomach gets blocked. This blocks everything from moving out.

In dogs, this happens when something gets stuck inside the stomach. This could happen if you feed your dog fast food or other objects that might get stuck inside the stomach.

Food can’t be digested properly when it gets stuck in the stomach. Vomiting occurs because the food pushes up into the esophagus (the tube leading down into the stomach). This leads to nausea and sickness.

Esophagus Issues

On top of the megaesophagus, the esophageal problems include esophageal and cricoarytenoid achalasia, swallowing defects, and myasthenia.

Regurgitation of indigestible foods could lead to vomiting. Geriatric onset laryngeal paralysis causes noisy breathing, difficulty breathing, and coughing.

Hoarse barking, hacking, and coughing could occur. Gagging, regurgitation, and hind-end weakness could also happen.


Dogs who regurgitate are usually having issues with their esophagus. Megaesophagus is where the muscles in the neck become weakened, and food and liquids may sit in the esophagus.

They may eat too fast and choke themselves. This could be due to an enlarged esophagus, or because of a disorder affecting the nerves controlling the esophagus.

Dogs’ esophagus is located in the chest, which makes them prone to choking if something gets stuck there.

This condition can also be caused by old age, as well as tugging the collar around your dog’s throat. Harnesses are better for dogs, because it takes any pressure away from their neck.

Foreign Objects

Vomiting is caused by many things, but mostly it is due to ingesting something bad.

Dogs love to eat grass, and sometimes they get sick because of it. Dogs also tend to eat most things that they can access.

If your dog vomits, then you need to remove anything foreign from him. Foreign objects such as bones, toys, buttons, coins, etc., can cause blockages in the intestines.

These blockages can lead to vomiting. Make sure you keep all items away from your dog.

Food Poisoning

Food poisoning is another common reason why dogs vomit. It is usually caused by bacteria found on raw meat.

Bacteria can grow quickly in warm temperatures, so it is best to cook your dog’s food before feeding it to them.

If you do not know how to prepare your dog’s meals, ask someone else to help you.

Pancreas Issues

Dogs who eat too much fat get pancreatitis. Acute pancreatitis makes them sick and causes them to vomit. Chronic pancreatitis is less serious and doesn’t make them sick as much.

They may still feel some abdominal pain and nausea. If they don’t take care of themselves, they could develop diabetes.

Gastric Hypomotility

Vomiting of undigested food occurs 7-10 hours after ingestion.

Gastric hypomotility is more likely to occur in older dogs than younger ones, and this is not a diagnosis, but it may mean your dog is having general gastric issues that need attending to.

It is unlikely to be gastric hypomotility, but it is always possible.


Vomiting can be caused by stress, excitement, or a nervous stomach.

Some dogs eat too much and vomit up what they haven’t digested. Your dog might be sick. See your vet if he or she vomits partially-digested food more than normal.

Why Is My Dog Throwing Up Right After Eating?

Vomiting straight after eating is caused by many different things. Some of these include:

  • A large meal.
  • Eating too fast.
  • Excitement causes narrowing of the esophagus
  • Tumors
  • Narrowing of the esophagus (dilation),
  • Megaesophagus
  • Autonomic nervous system issues
  • Dog Breed: some dog breeds like German Shepherds, Great Danes, Labradors, Newfie, Shar-Pei, and Miniature Schnauzers are more prone to regurge than others.

Fast eating dogs vomit right away because they eat too fast. Changing diet can cause GI intolerance.

Dogs who eat too much often throw up. This is normal, but if your dog throws up more than twice in 24 hours, or six times in 48 hours, then you need to see a veterinarian.

Some dogs may have more sensitive stomachs in comparison to other breeds.

Dogs prone to sensitive stomachs include German Shepherd, Golden Retriever, Border Collie, Labrador Retriever, Poodle, Cocker Spaniel, Beagle, Dachshund, Jack Russell Terrier, Chihuahua, Shih Tzu, Yorkshire Terrier, Bulldog, Pug, Rottweiler, Boxer, Dalmatian, Chow-Chow, Maltese, Papillon, Cockapoo, and others.

These dogs are more likely to throw up if they eat too much fat.

Bad food causes dogs to vomit. A dog’s digestive system doesn’t absorb any kind of foreign object, including rocks or bones. Therefore, if a dog swallows such an object, it will cause him to vomit.

Another reason why dogs may throw up straight away is due to eating foreign objects or bad food. Some dogs eat garbage, table scraps, or other foreign objects.

Poisonous substances such as antifreeze, household drugs, rodenticide, pesticides, chocolate, onion, garlic, toys, and other foreign objects can cause vomiting.

Why Would My Dog Throw Up After Several Hours?

Vomiting is a common symptom of many different illnesses. Puppies are particularly vulnerable to infectious diseases such as parvo and distemper.

Vomiting is an important symptom for many different illnesses.

In dogs, vomiting can be caused by a number of things including gastrointestinal disorders, kidney problems, and liver problems.

Vomiting can also be a symptom of more serious conditions such as heart failure, seizures, and other neurological disorders. However, this is usually if your dog has been continually vomiting.

Above, we looked at many different reasons why your dog may throw up after several hours, and it’s usually nothing to worry about.

Why Do Dogs Throw Up At Night?

Dogs who vomit food at night are likely to be experiencing reverse motility. This means that their digestive system is working backwards.

Vomiting occurs because the stomach contents reflux back into the esophagus.

When this happens, the esophageal sphincter opens and allows the contents to come out.

The esophagus is a tube that connects the mouth to the stomach. It is made up of muscle tissue, and is located just behind the trachea.

It acts as a one way valve, so when the esophagus relaxes, it lets air pass through, but not food.

If the esophagus does not work properly, this valve becomes loose and food can flow backward.

What Should I Do If My Dog Has Been Vomiting For Days?

dog at the vet

If your dog has been throwing up for days on end, he needs to go to the vet immediately.

You should never wait until your dog vomits again before visiting a veterinarian. Your dog could be suffering from something very serious, such as a life threatening illness.

If you notice that your dog is constantly throwing up, he may need medical help right away.

He may need fluids administered intravenously (IV) to prevent dehydration. He may need medications to stop his stomach from producing acid. In addition, he may need antibiotics to treat infection.

Why Do Dogs Eat So Fast?

If you’ve ever watched a puppy play with an empty bowl, it’s easy to see how fast he’ll eat.

When a puppy first starts playing with a bowl, he’ll usually take only one bite at a time. He doesn’t want to waste any food. But as he gets older, he learns that he can eat more than once if he wants to.

The same thing happens when your dog plays with a full bowl. He may start out by taking just a few bites before putting the rest back in the bowl. But over time, he’ll learn that he can eat all he wants.

The reason for this behavior is simple: Your dog has learned that he can make himself feel better by eating. His brain tells him that by eating quickly, he can avoid feeling hungry again soon.

How To Stop Your Dog From Eating Too Much

There are several ways to stop your dog from overeating. You should be aware that some methods work best on puppies while others work well on adult dogs.

Limit Access To Refrigerator & Freezer

Your refrigerator and freezer contain foods that are high in fat and protein. These items are perfect for dogs who are trying to gain weight. However, they’re not good for dogs who already have a healthy diet.

Your dog needs to consume less of these types of foods so she won’t put on extra pounds. She could end up overweight if her owner keeps giving her access to these foods.

Keep Bowls Clean

It’s important to keep bowls clean. Dirty bowls encourage your dog to eat more.

Don’t Leave Food Out All Day

You might think that leaving food out all day would help your dog lose weight. In reality, it does the opposite. It encourages your dog to eat more because she knows she can always find food.

Use A Water Fountain

A water fountain provides your dog with a source of freshwater. If she drinks from a dirty bowl, she could become ill.

Dogs sometimes avoid drinking from their water bowls, and they often prefer a stream of water, instead.

Make Sure There Are No Chew Toys Around

Chew toys are great, but they may cause your dog to have stomach issues, especially if the toys are rawhide. This will mean they are trying to eat it.

Some toys may actually be eaten by dogs, hence why they may want to eat all the time.

Keep Food Away From Puppies

Puppies need to be taught to eat slowly. Otherwise, they’ll eat too much. By keeping food away from them, you can prevent this problem.

Buy High-Quality Foods

Many people believe that cheap dog food is healthier than expensive food. This isn’t true. Cheap dog food often contains ingredients that are unhealthy for pets.

Give Your Dog Smaller Portions

When you give your dog smaller portions, she won’t get used to eating large amounts. Instead, she’ll learn to enjoy small meals.

Feed Her Regularly

If you feed your dog regularly, she’ll be less likely to overeat. You can try giving your dog frequent small meals, or two large meals every day.

Avoid Giving Her Sugary Treats

Sugary treats are highly addictive for dogs. They cause serious health problems such as obesity.

Be Consistent With Dieting

If you’re going to try to change your dog’s eating habits, you must stay consistent. Otherwise, she won’t understand what you mean when you tell her “no”.

Start Slowly

Start by reducing the amount of food you give your dog. Then gradually increase the amount until you reach the desired size.

Reward Good Behavior

Reward your dog for being good by giving her something tasty. For example, offer her a treat after each meal.

Try Different Methods

Don’t expect one method to work for every dog. Some dogs will respond well to certain techniques while others won’t.

Consider Consulting A Veterinarian

If none of the above suggestions work, consider consulting a veterinarian. He may suggest other solutions.

How Long Does It Take To Get Rid Of Diarrhea?

Diarrhea is one of the most common problems affecting dogs. The symptoms include frequent urination, vomiting, watery diarrhea, and blood-streaked stool.

The best thing to do if your dog has diarrhea is to keep him hydrated. Make sure he gets plenty of fresh water every day. Also make sure that he eats a healthy diet.

If you suspect that your dog has a parasite infection, consult your vet immediately.

What Can I Do To Prevent Diarrhea?

Dogs are prone to diarrhea because their digestive system isn’t designed to handle large amounts of solid food.

This means that if you give them too much, they’ll either vomit it back out or pass it on through their feces.

When feeding your dog, start small. Feed her a few bites at first, then gradually increase the amount she takes over time. Don’t force feed her.

You can help prevent diarrhea by keeping your dog’s diet varied. Avoid giving your dog only dry kibble. Instead, mix some wet food into his meal plan so that he always has both types of food available.

You can also try mixing different kinds of foods together. Some dogs prefer beef while others prefer chicken. Try feeding your dog a mixture of these two types of meat.

Keep your dog away from other animals that may carry parasites.

Can I Give My Dog Too Much Water?

dog drinking water

Giving your dog too much water will cause him to become bloated. He will also need to poop more frequently.

If you think that your dog needs extra fluids, talk to your veterinarian about what to do.

When Should I Be Concerned About My Dog?

Your dog should show no signs of illness when you take her in to see the vet. However, there are times when your dog might have an underlying problem that requires immediate attention. These include:

  • Seizures
  • Vomiting blood
  • Difficulty breathing
  • Unusual behavior
  • Sudden weight loss

If any of these conditions occur, call your vet right away.

How Often Should I Check On My Dog?

It depends. If your dog seems to be acting normally, check him daily. If he shows any signs of illness, however, check him more often.

For instance, if your dog starts showing signs of pain, such as limping or having trouble walking, contact your vet immediately.

What If My Dog Might Have A Parasite?

A parasite is an organism that lives inside another animal. Dogs are particularly susceptible to parasites because they eat raw meat.

Parasites can affect your dog’s health in many ways. They can cause intestinal blockages, which lead to vomiting and diarrhea. They can also cause skin infections.

Parasites can spread rapidly among dogs. Therefore, it’s important that you get rid of them quickly. Consult your vet for advice on how to treat your dog if your dog is throwing up a lot.

What Foods Are Bad For Dogs?

The most common causes of upset stomachs in dogs are eating too much high-fat food, drinking too much water, and not getting enough exercise.

High-fat foods contain lots of calories but very little protein. This makes them hard for dogs to digest.

High-fat foods include fatty meats, dairy products, and greasy pet treats.

Some people believe that canned foods are bad for dogs. In fact, this is true only for certain canned foods. Canned foods with low sodium content are safe.

Dogs who eat a lot of canned food tend to develop kidney stones. High levels of salt in canned foods can also make a dog urinate excessively.

Water is essential for all living things. It helps maintain the body’s temperature and provides nutrients.

The best way to ensure that your dog gets plenty of water is to keep him active. Exercise also increases the amount of fluid in the bloodstream.

You can also give your dog water whenever she wants it. Just remember to monitor her closely so that you don’t overfeed her.

What Can I Do To Prevent Upset Stomachs?

Feeding your dog a diet rich in fiber can help prevent digestive problems. Fiber is found in fruits and vegetables. It keeps your dog regular by helping her pass stool.

Feeding your dog a diet high in fiber can also reduce the risk of developing cancer.

Talk to your veterinarian about feeding your dog a diet rich with fiber. Ask whether your dog has any special dietary needs.

Can I Give My Dog Some Treats?

Yes! You can give your dog some healthy treats. But be careful not to overdo it. Too many treats will just encourage your dog to overeat.

When choosing treats for your dog, look for ones made from natural ingredients. Look for treats that have no added sugar, preservatives, artificial colors, flavors, or sweeteners.

Try giving your dog a few pieces of fresh fruit once in a while. The fruit contains antioxidants that may help protect against diseases like cancer.

If your dog is overweight, talk to your vet about what kind of diet would work best for him.

Final Thoughts

Dogs are prone to throwing up every once in a while, and they may be throwing up undigested food straight after eating, or hours later.

It’s important to know what might be causing your dog’s upset stomach. If you suspect that he has parasites, consult your vet immediately.

In addition to treating your dog’s symptoms, you should also try to identify the source of his problem.

Try to avoid making changes to your dog’s diet until you’ve ruled out other possible causes.

We hope this guide has helped you!

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