My Dog Throwing up Yellow Foam, What can I do?

My dog throwing up yellow foam

Dogs vomit often. It is easy to panic and fear that the cause is some severe illness. However, you have to stay calm and analyze the situation. Occasional vomiting from the dog is generally of no consequence.

This does not mean that you should not monitor your dog and go to your veterinarian if vomiting occurs continuously, is accompanied by other symptoms, or you are concerned about the possibility that it may be due to some disease.

The color of vomit, its frequency, and its characteristics are important in finding its cause. If your dog vomits foam or yellow mucus, it is due to the presence of bile, a fluid produced in the liver to break down fats in food.

Most common cause of yellow vomiting in dogs

Vomiting is quite common in dogs. The most common causes are consuming some indigestible substance (for example, herbs) or overeating. It can also be due to a state of anxiety or stress, phobias or diseases, both infectious and chronic.

Vomiting can be of different types, and you must consider it to establish a first approach towards its causes :

Persistent vomiting

If your dog is repeatedly vomiting or gagging and the fluid he expels is a clear or light yellow foam, he may have an irritated stomach. It can be due to acute gastritis or more serious conditions, such as acute pancreatitis, gastric flow obstruction, intestinal obstruction, and peritonitis. It can also be infectious enteritis.

Sporadic vomiting

If your dog vomits and stops alternately for a few days or weeks, has a poor appetite, and doesn’t seem related to food, he may be suffering from liver or kidney disease. In these cases, the dog is listless and haggard. It can also be due to chronic gastritis, a gastric or duodenal ulcer, parasite infestation, diabetes, or a gastric tumor.

Vomiting blood

Blood indicates hemorrhage somewhere between the mouth and the beginning of the small intestine. It is usually due to a gastric or duodenal ulcer, foreign bodies in the gastrointestinal tract, or a gastric tumor. It would help if you went to your vet.

Fecal vomiting

The vomit, in this case, has a fetid odor similar to that of feces. It is a sign of bowel obstruction or peritonitis. Go to your vet.

Projectile vomiting.

It is active vomiting in which the stomach contents are expelled a great distance. The most common cause is gastric flow obstruction. The diseases that cause pressure on the brain, such as tumors, blood clots, or encephalitis, also produce this type of vomiting.

Vomiting of foreign bodies.

If your dog ingests a foreign body, it is easy for him to vomit it later. It could be anything: rubber balls, pieces of toys, clothes, sticks, rocks. If your dog has a nematode infestation, he may also vomit adult worms (this frequently happens in the case of puppies). Go to your vet.

My dog vomits yellow because he has an empty stomach.

When your dog has not eaten for a while, the bile can irritate his stomach lining and induce vomiting. This is known as Bilious Vomiting Syndrome, and it is a rare but not serious event.

The most common symptom is daily or intermittent vomiting, usually yellow and liquid, without food. To prevent this, feed your dog more often.

My dog has yellow vomit. Could it be due to a food allergy?

A food allergy is a condition in which the dog’s immune system attacks a particular component of its diet.

In the case of food intolerances, the immune system is not involved. The symptoms are similar to those of allergies. In this case, it may be due to a sensitivity to specific components of some nutrients.

The allergenic foods often cause vomiting in dogs. Those that cause allergies and intolerances most frequently are the following:

  • Dairy products
  • Chicken
  • mutton
  • Fish
  • Egg
  • Wheat
  • Corn
  • Soy

You must pay attention to your dog’s diet. Avoid foods that may be toxic to him, and if you suspect that he may be allergic or intolerant to any food, use a feed with limited ingredients and try to locate which one is causing the problem.

Consult your vet to help you solve the problem.

My dog eats grass and vomits a yellow foam.

Most dogs eat grass regularly and then don’t throw it up. In addition, they rarely show symptoms of having any intestinal discomfort. Currently, it is believed that it is a natural behavior inherited from its ancestors and that it is not associated with gastrointestinal distress.

In the case of wolves, it is believed that the consumption of grass can be a method of elimination of intestinal parasites. Dogs may maintain this predisposition to eat grass due to genetic reasons.

It has also been suggested this intake could be related to the lack of nutrients and fiber, but no study confirms this.

However, it is true that when dogs have gastric disease, eating grass seems to cause vomiting. It appears that in these cases, they swallow it quickly and without chewing.

Currently, it is believed that dogs eat grass simply because they like it. This habit is not a problem, but it is important to observe their behavior.

It is important to note that park grass can contain pesticides. This product is toxic and can cause your dog to vomit a yellow foam.

If your dog consumes grass to make himself vomit frequently, you should see your vet.

Other factors that induce your dog to vomit

Vomiting can be the result of environmental factors. For example, excessive heat, heatstroke, or dehydration can cause your dog to vomit. You must protect your dog and keep him in ventilated and incredible places, with fresh water at his disposal.

Travel sickness or motion sickness is called motion sickness and is caused by the movement of fluid in the inner ear’s labyrinth. This situation can cause your dog to vomit a yellow foam or food in its stomach. Dogs travel best on an empty stomach. If you have to take a trip with him, discuss the problem with your vet. Perhaps he can prescribe you some medication to control the symptoms.

Can my dog’s yellow vomit be a symptom of a more serious illness?

Most of the time, yellow vomit is not a cause for concern. Your dog will vomit and will continue his life calmly without further consequences.

However, sometimes it is a symptom of a bigger problem. Another, more serious problem may cause your dog’s vomiting. In these cases, it is usually accompanied by other symptoms.


The pancreas is responsible for the secretion of digestive enzymes that help break down fat. When we quickly change the dog’s diet to start with one higher in fat, or if your dog consumes some other fatty food, his pancreas may become inflamed. In this case, the yellow vomit will occur between one and five days after finishing the wrong food.

In addition to vomiting, your dog may suffer from diarrhea, stomach bloating, loss of appetite, fever, or abdominal pain. It is also common for the dog to arch its back and rest its chest on the ground.

It is important that you gradually change of his diet and keep the foods that can harm her out of reach.

If your dog suffers from chronic pancreatitis, your vet will probably recommend a low-fat diet.


Peritonitis is an inflammation of the abdominal cavity.

It can be due to several causes :

  • torsion / dilation
  • ulcers
  • ruptured bladder
  • acute pancreatitis
  • perforations caused by foreign bodies

Yellow vomit is one of its symptoms. In addition, the dog has a very hard abdomen and is painful. It would help if you went to the vet urgently.

Stomach flu

Gastroenteritis is an inflammation of the stomach and intestines. It is a more common cause of vomiting in dogs. It can be due to different reasons and is accompanied by other symptoms, such as diarrhea. The most typical causes are the change in your dog diet or the ingestion of food or foreign materials (grass, toxic foods, chemicals …)

  • The excessive vomiting yellow can be a symptom of a gastrointestinal problem.
  • Intestinal parasites
  • stomach ulcers
  • IBD (Inflammatory Bowel Disease)
  • liver problems
  • some cancers

It can lead to yellow vomit. This vomiting will be accompanied by other symptoms, such as the following:

  • Loss of appetite
  • Diarrhea (possibly bloody)
  • Lethargy
  • Depression
  • Change in dog behavior
  • Bloody vomit
  • Dehydration
  • Yellowing of the skin, gums, or eyes
  • Weightloss

Intestinal obstruction

Anything that blocks the passage of intestinal contents through the gastrointestinal tract causes a bowel obstruction. The most common cause is the presence of foreign objects in the gastrointestinal tract.

In some cases, yellow vomit can signify that your dog has swallowed a foreign object. If the vomit is brown or projectile, or your dog has sudden and chronic vomiting, see your vet urgently.

Gastric or duodenal ulcer

An ulcer is a perforation in the gastric wall. It occurs more often in the stomach than in the duodenum. It is usually due to accidental poisoning or the use of a corticosteroid medication or an anti-inflammatory.

Yellow vomit can be a sign of a stomach ulcer. In this case, in addition to severe vomiting and weight loss, your dog will experience other symptoms, such as fever, abdominal pain or bloating mucus in the stool, and pale gums. Sometimes vomiting is accompanied by blood.

Liver problems

The liver plays an essential role in digesting food and removing toxins from the blood. If your dog vomits yellow foam, it could be due to a liver problem.

What can I do if my dog has yellow vomiting?

The first thing you should do if vomiting is accompanied by other symptoms that warn of a possible disease is to visit the veterinarian so that he can examine your dog and apply the appropriate treatment.

Go to your consultation if the following situations arise :

  • At the slightest doubt about the cause of vomiting.
  • Vomiting persists even if your dog has fasted for several hours.
  • Your dog vomits every time he tries to eat.
  • Your dog vomits after drinking water.
  • Vomiting occurs more than three times an hour and lasts for more than a day.
  • Your dog shows signs of pain.
  • Your dog is lazy.
  • Your dog has diarrhea (especially if it is bloody).
  • Your dog vomits blood that looks fresh or looks like coffee grounds.
  • Projectile vomiting occurs.

But if yellow vomit is occasional and doesn’t seem to be accompanied by other symptoms, there are a few things you can do :

  • Provide small and frequent meals to your dog. This will help keep your dog stomach full and prevent the build-up of inflammatory toxins. It does not mean that you have to increase the amount of food, but rather distribute it in more servings throughout the day.
  • Make your dog diet changes little by little. Changes in diet can affect digestion, so if you are going to modify it, you should do it gradually. Consult your vet to see if the change is recommended.
  • Watch what your dog eats. Keep chemicals and foods that may be toxic to him out of reach. Prevention is better than cure.
  • Follow a bland diet until the problem passes. While vomiting lasts, provide your dog with easily digestible food. There are specific feeds for gastrointestinal issues. You can also give him cooked rice or potato or cooked minced chicken breast. Let your vet guide you.
  • When your dog is well, gradually increase his rations.
  • If you want to give him an isotonic preparation, consult your veterinarian first.
  • Make sure your dog is well hydrated. Vomiting causes dehydration, so you must provide fresh, clean water at all times. If your dog is not drinking enough, consult your veterinarian if intravenous fluids are necessary. If he doesn’t want to drink, you can offer him ice cubes. The chicken is also a good choice.
  • The dehydration problem is important in the case of puppies or older dogs since it occurs very quickly. Consult your veterinarian if this is your case.

Remember that this article is intended to be informative, but we cannot establish a diagnosis for your dog. If in doubt, go to your veterinarian to examine it and find the causes why your dog is vomiting.


  • Vomiting is common in dogs and is often of no consequence.
  • The type of vomiting is indicative of the problem your dog is suffering from.
  • Yellow vomit is due to the presence of bile.
  • A dog may vomit yellow foam because it has an empty stomach.
  • Food allergies and intolerances are also a cause of yellow vomiting.
  • Environmental factors, such as heat stroke or excess heat, can induce your dog to vomit.
  • Travel sickness is a common cause of yellow vomit in dogs.
  • Your dog may eat grass to induce vomiting.
  • If your dog has consumed a toxic product or ingests foreign bodies, it can also vomit.
  • Vomiting foam or yellow mucus can be a symptom of various diseases, such as pancreatitis, enteritis, peritonitis, ulcers, or liver problems.
  • Remember that this article is informative and not intended to diagnose.
  • If your dog vomits often and you have the slightest doubt about its causes, see your vet.

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