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Reasons Your Dog Might Be Vomiting Yellow Bile

A dog’s Vomit that’s yellow or green, or looks foamy, usually contains bile. Bile is a fluid produced in the liver and stored in the gallbladder. The bile enters the duodenum (located just past the stomach) to further assist with digestion.

Bile is essential for proper digestion in small amounts. But it sometimes builds up in the stomach or gastrointestinal tract. And then it can cause your dog to feel uncomfortable and vomit.

Vomiting of bile that occurs in the morning can be an indication of a more rare disorder, Bilious vomiting syndrome (BVS). Feeding your dog late at night, or more frequently may resolve this issue, but you should consult your vet for a diagnosis.

Schedule a visit with the veterinarian promptly for a diagnosis of vomiting with bile because you do not want the problem to lead to even more serious consequences, such as severe dehydration or excessive weight loss.

Major Causes of Yellow Bile Vomiting in Dogs


Heat in the gastrointestinal tract can be a reason your dog vomits bile. Heat can come from inflammation in the stomach and small intestine. This happens when fluids that circulate run low.

So when your dog has an empty stomach … he might vomit bile. Lack of food can cause bile to build up and irritate your dog’s stomach lining. Usually this happens overnight … so your dog will throw up soon after he wakes up.

Acids in a dog’s stomach are similar to ours … but digestive secretions aren’t released in the same way. Your dog’s digestive system releases bile and enzymes even if he hasn’t eaten.

This type of bile vomiting is sometimes known as bilious vomiting syndrome. People also call it hunger pukes.


Endocrine disorders like pancreatitis can occur after a dog ingests highly fatty or oily foods. This causes inflammation of the pancreas, and in turn, bilious vomiting, along with intense abdominal pain and diarrhea.

Pancreatitis usually occurs three to five days after a dog eats fatty foods, but it can occur as early as 24 hours after. So you could see your dog throwing up bile between 24 and 48 hours after they ate the fatty food.

To help treat this, veterinarians will provide care to prevent against dehydration and electrolyte imbalances

Intestinal Blockage

An intestinal blockage may result in vomiting with bile because the foreign body that is lodged in the intestinal tract does not allow for the processing of food into waste, but will cause vomiting instead.


Dogs that consume anything to which they are allergic may produce yellow vomit. This usually occurs after a change in the diet. The products most likely to cause an allergy are dairy products, wheat, maize, soya, fish, lamb and pork.

Liver disease

The liver plays an important role in various metabolic processes, so any impairment of its function is usually reflected in the digestive, nervous and renal systems. In some cases, yellow vomit in dogs is accompanied by diarrhoea, acholic faeces due to obstruction of the bile ducts and coagulation disorders.


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