Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Does My Dog Throw Up in the Morning? 10 Vet-Verified Causes

Share

senior dog lying on the floor looking at the side

There are so many reasons that owning a dog is one of the most fulfilling relationships that you can have. But with the good comes the bad, and part of this friendship comes with vomit. Cleaning up the vomit or some foamy liquid is not exactly our idea of a good time.

But why do some dogs seem to throw up more frequently in the mornings? Here, we discuss this question and when you should take your pup to the vet, along with advice on ways that you can help your dog.

Cleaning The Mess

A good cleaner helps you quickly clean up messes, especially when you come across vomit in the morning. This allows you to focus on more important things, like your pet’s health.

No matter how hard you try, pets will always leave you cleaning up smells, stains, vomit, hair, and everything in between. With the Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray, you can advance your clean-up routine!

Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
  • ADVANCED ENZYMATIC CLEANER - Penetrates the most stubborn smells and stains at the deepest molecular...
  • FOR ANY MESS, ON ANY SURFACE - This pet odor eliminator cleans your carpets, floors, furniture,...
  • FRESH, NATURAL ODOR - Our unique formulation doesn't rely on dangerous or unpleasant chemical...

It permanently removes the very worst pet stains and smells (and truly makes clean-up a breeze). Click here to learn more, order a bottle, and freshen up your home today.

At Dogster, we’ve admired Hepper for many years, and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool pet company!

The 10 Potential Causes for a Dog to Throw Up in the Morning

1. Empty Stomach

This is probably the most common reason dogs throw up in the morning. It’s known as bilious vomiting syndrome, which is when dogs vomit foam and bile, usually in the early morning, but otherwise seem fine. When they go for too long on an empty stomach, intestinal and stomach reflux can occur, which leads to the dog vomiting bile.

Bile is made by the dog’s liver and stored in the gallbladder. When food passes through, the bile enters the small intestine and aids in the digestion of the food.

So, when your dog throws up a yellowish-green substance, this is the bile that abnormally enters the stomach. The longer that the stomach is empty and inactive, the more the bile reflux is triggered, and more acids build up irritating the stomach lining.

The solution is to feed your dog at regular intervals twice a day so they don’t go for so long without food. This solution should work most of the time, but there could be other health issues, so if this doesn’t work, you should take your dog to the vet.

sick male beagle dog lying on the sofa
Image Credit: Przemek Iciak, Shutterstock

2. Foreign Body

If a dog ingests something inedible, it can cause stomach irritation, which can lead to vomiting, particularly when the stomach is empty. Sometimes, the dog can eventually throw up the object, but the vet often needs to check what’s going on inside the dog with X-rays or an ultrasound.

The object can often be removed through endoscopy or, in a worst-case scenario, surgery.


3. Eating Food Too Fast

When dogs eat food too fast, especially on an empty stomach, they can vomit it back up again. When dogs eat too quickly, they will also gulp down air with the food, which can potentially lead to gastric torsion, otherwise known as bloat, which is a life-threatening condition.

There are a few reasons that dogs gulp their food down, some of which might be medically related. It might be a good idea to have your vet run a few tests to be on the safe side.

If your dog is gulping down food because of competition with other pets, try to feed everyone separately. You can also try feeding your pup small, frequent meals. There are also slow feeder bowls that make it more challenging for a dog to eat quickly.

Speak to your veterinarian so you can rule out any health conditions and get advice on what approach might best help your dog.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1


4. Grass

If your dog vomits shortly after going outside and eating grass, it’s quite common. It’s the grass itself that causes the vomiting, and it’s normal dog behavior for the most part.

The biggest risk to your dog is intoxication from chemical products used to treat the garden. Familiarize yourself with the other intoxication signs and bring your dog to the vet if it’s something that you’re concerned about.

Intoxication Signs
  • Drooling
  • Vomiting
  • Diarrhea
  • Eye tearing
  • Urination (sometimes abnormal color)
  • Lethargy
  • Difficulty breathing (due to bronchoconstriction)
  • Abnormal heart rates
  • Collapse
  • Tremors
  • Seizures
  • Death

If your dog is a regular grass eater it’s a good idea to provide a safe garden. You should also make sure your dog is up to date on their vaccinations and deworming schedule.


5. Exercising After Eating

If your dog has eaten a big breakfast and then goes out for strenuous exercise, this might lead to a vomiting session. Just like people can become ill when exercising after eating, the same goes for dogs.

The best solution is to give your dog a small meal or treat before going out for a walk or at least make the walk more of a slow and steady activity.


6. Health Conditions

Certain health conditions in dogs can lead to vomiting signs. One of these is pancreatitis, which is the inflammation of the pancreas. Some breeds tend to be more predisposed to this condition than others. Other signs include lethargy, lack of appetite, and abdominal pain.

Inflammatory bowel disease, as well as food allergies and sensitivities, can cause a dog to vomit in the morning. Other signs include weight loss, abdominal pain, fatigue, flatulence, and diarrhea.

One of the primary signs of megaesophagus is vomiting. Other signs include weight loss, excessive drooling, coughing, bad breath, and noisy breathing.


7. Intestinal Parasites

There are many internal parasites that can cause vomiting, although the main sign is usually diarrhea. Giardia is a tiny, microscopic parasite that lives in a dog’s intestines. Beyond throwing up, symptoms include diarrhea, frequent urges to poop, lethargy, lack of appetite, and smelly flatulence.

Another microscopic parasite is coccidiosis, which lives in a dog’s GI tract. It has the same signs as giardia, but if left untreated, it can lead to death.

Sick mastiff dog sitting on table in a vet clinic
Image Credit: UfaBizPhoto, Shutterstock

8. Food Poisoning

Sometimes, dogs eat things that they shouldn’t and can experience food poisoning, which can involve vomiting. Whether your pup got into the garbage, snatched something from the counter, or ate a plant, any one of these items might make your dog vomit or have diarrhea, lack of appetite, dehydration, and lethargy.

Drinking contaminated water can also cause vomiting and possibly death.


9. Viral Infections

Certain viruses include vomiting as one of the signs. One of the worst is parvovirus, which is highly contagious among dogs and has signs of lethargy, lack of appetite, fever, vomiting, and diarrhea.

As long as you keep your dog updated with vaccinations, though, they should be safe from catching parvo.

Puppy with parvovirus
Image Credit: LittleDogKorat, Shutterstock

10.  Medication

Certain medications can cause vomiting as a side effect. Some dogs might even vomit from tick-and-flea treatments or antibiotics. If you believe that your dog might be ill from its medicine, speak to your vet. They can prescribe a different kind of medication that hopefully won’t make your dog sick.

Summary

Most of the time, if your dog is vomiting in the morning, it is a sign that needs attention but can be remedied. If the vomit is due to the dog only eating once a day, the best solution is to give your dog at least two meals throughout the day.

The longer your dog goes without food in its tummy, the more likely you’ll find a puddle of bile on the floor. You can certainly get your dog used to fasting windows, and this is a healthy habit, but they should receive at least two meals a day. However, if your dog is vomiting in the morning and has other symptoms, like a loss of appetite, no energy, and diarrhea (particularly if there’s blood in it), take your pup to the vet immediately.

Morning vomit is usually nothing to worry about, but keep an eye on your pup and note any other signs. Your dog’s health is the most important thing.

See also:


Featured Image Credit: JumpStory

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Do Dachshunds Shed a Lot? Vet-Verified Facts & FAQ

If you’ve thought about getting a Dachshund, you may wonder whether they shed. Dachshunds come in long-haired, wire-haired, and smooth varieties, all of...

Why Do Dogs Lift One Paw? 6 Vet-Verified Reasons

Dogs may not share our language, but that doesn’t keep them from being effective communicators. Understanding the nuance of their minor body positions...

Poodle vs Labradoodle: The Differences (With Pictures)

Poodles and Labradoodles are adorable, fluffy, teddy bear-like dogs. They are both intelligent, easy to train, and great with kids. They also tend...

Why Does My Dog Whine All the Time? 7 Vet-Verified Causes & How to Stop It

Whining is one of several common canine vocalizations, and dogs use it to express a variety of emotions. Whining can happen occasionally, like...

More related

How to Choose a Puppy From a Litter (3 Vet-Approved Tips)

Choosing the correct puppy from a litter can seem like a huge decision. After all, what happens if you don’t choose the right...

Portosystemic Shunts in Dogs (PSS): Signs, Causes & Treatment (Vet Answer)

Portosystemic shunts are defects in the blood flow between the abdominal organs and the liver. Shunts are due to abnormal blood vessels, shunting...

Can Dogs Eat Dried Mangoes? Vet-Verified Nutritional Info & Risks

A mango can be a beautiful, delicious, and healthy part of a human’s diet. When ripe, this juicy fruit is easy to eat...

10 Best Harnesses for Small Dogs in 2026 – Reviews & Top Picks

Many small breeds wear harnesses because they can be safer than traditional collars. Tiny pups can slip out of those collars easily, or...

Keep reading

9 Best Treats for Puppies in 2026 – Reviews & Top Picks

Giving treats is one of the most fun parts of owning a dog. Selecting treats for your puppy can be a daunting task with all the different options on the market. Pet parents find themselves scouring reviews for the best...

puppy having treats

Can Dogs Eat Cabbage? Vet-Verified Nutrition Facts & Info

Cabbage is considered a healthy vegetable for humans, and one that we are encouraged to eat regularly as part of a balanced diet. It is also non-toxic to dogs, and, when fed in moderation, can make a beneficial addition to...

Dogster-Can-Dogs-Eat-Cabbage

Can Dogs Eat Mahi Mahi? Vet-Reviewed Facts

Providing your dog with the best possible diet is a top priority for all dog owners, but sometimes we may feel like our dogs get bored with the same meals every day. While we are cooking up a storm in...

Can Dogs Eat Mahi Mahi

What Is Human-Grade Dog Food? Vet-Verified Facts About Ingredient Difference

Bringing a dog into your life is a special time for a family. Not only do you have a new friend, ally, and snuggle partner, but there is also another life you’re responsible for. This means ensuring your pets are...

The farmer's dog Turkey recipe fresh

How to Make Chicken Jerky for Dogs: Vet Approved Recipe & Tips

Chicken jerky is a delicious treat for your dog. Most dogs love chicken, and it’s often found in dog foods. Some dogs may be allergic to chicken, but as long as your doggie has no chicken allergy, you can make...

close up of a dog eating from the bowl

Can Dogs Eat Cauliflower? Vet-Verified Nutrition Facts & FAQ

According to the International Fresh Produce Association (IFPA), cauliflower is the 16th most popular vegetable based on 2022 retail sales.1 After all, you can enjoy it in so many ways, whether as a rice substitute, raw, or in the various...

Can Dogs Eat Cauliflower

Can Dogs Eat Froot Loops? Vet-Reviewed Nutrition Facts

Many of us grew up eating cereal in front of the television while watching cartoons. Of the many cereal choices on the market, one of the most popular is Fruit Loops. These colorful loops are certainly tasty but not very...

Can Dogs Eat Froot Loops

Can Dogs Eat Limes? Vet-Approved Facts & FAQ

Disclaimer: Before changing your dog’s/ cat’s diet or introducing new ingredients or supplements that they haven’t eaten before, especially when it comes to human food, make sure to consult your veterinarian first. Every dog/cat is different and requires an individual...

Can Dogs Eat Limes

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter