Why Is My Dog Vomiting Bile in the Morning?

It Could Be an Empty Stomach

If your dog is throwing up bile (a yellowish liquid) in the early morning or in the middle of the night, it may simply be because it has an empty stomach.

This is most likely the case if the dog vomits at approximately the same time and also has a regular mealtimes.

Try Feeding the Dog a Small Meal Before Bedtime

The solution to this problem is often very straightforward: feed the dog a small meal right before bedtime.

This should help settle the stomach and ultimately solve the problem as the acid production would cease. Of course, this won't always work as there may be other potential causes for vomiting bile, so please see your vet if the problem continues.

When I used to work at the vet hospital and owners would call us about their dogs vomiting bile, they were often surprised to hear this simple solution. Some of them called us back to let us know how well it worked.

Here are two other things to try to see if they help stop these morning episodes.

Feed Dogs Twice Daily, Once After 7 PM

It also helps to ensure the dog gets fed at least twice a day, with the second meal after 7 PM. When dogs are fed only once a day, the stomach may stay empty for too long, which results in bilious vomiting syndrome.

In some cases, it may also help to divide the dog's daily food portion in three or four small feedings during the day.

Reduce Time Between Meals or Use Medication

If your dog is acting normal and eating and defecating normally, it helps to reduce the time in between meals, explains veterinarian Dr. Mary Fuller. For severe cases, veterinarians may prescribe famotidine (the active ingredient of Pepcid A/C).

In this case, famotidine will reduce acid secretion and prevent the chances for injury to the dog's esophageal mucosa. Some vets will use sulcralfate, omeprazole or even reglan instead.

Does your dog's vomit leave unsightly stains on the carpet?
Does your dog's vomit leave unsightly stains on the carpet?

Why Is the Vomit Yellow?

Bile Is Yellow

As if vomiting alone was not enough cause for concern, a dog vomiting bile may really fuel worrisome thoughts.

What could cause a dog to vomit yellowish liquid, especially in the morning or at night? Most dog owners end up feeling puzzled since they can't remember any foods that could cause such a coloring.

The most likely cause of the yellow is due to the presence of bile. This is a bitter tasting, yellowish fluid secreted by the liver and stored in the gallbladder.

This fluid, which aids in digestion and helps emulsify food, is normally released by the liver and directed to the small intestine where, among other things, it helps with the absorption of fats, according to Vet Info.

In a normal situation, the bile stays inside the dog and does its job helping with digestion.

Vomiting Results When There's Too Much Bile

A dog might vomit bile because excess acid in an empty stomach can irritate it and cause a vomiting episode. This creates a vicious cycle.

This is why if there is some food eaten during the night, chances are that less acid will develop and this will possibly solve the problem. The dynamics are quite similar to what happens in people suffering from acid reflux disease. Affected dogs are known by vets as suffering from "chronic bilous vomiting syndrome"

Other Possible Causes

Irritable Bowel Disease

Another cause may be irritable bowel disease, which is often known by the acronym ''IBD." A mild form of IBD may cause dogs to have chronic irritation of their intestines which causes vomiting in a random matter. You might need to change their diet to highly digestible "sensitive stomach" formulations or possibly give the dog a bed time snack.

Drinking Too Much Water

If your dog's throwing up yellowish, foamy liquid after drinking water, it may be because the dog drank water and happened to vomit on an empty stomach.

If a dog has an upset stomach, drinking lots of water may further upset it. For this reason, it is recommended to give vomiting dogs ice cubes to lick about every four hours to prevent them from gulping down too much water and irritating the stomach, which needs to rest. Some dogs simply like to gulp tons of water at once, ultimately leading to an upset stomach.

Vomiting Bile and Grass

In some cases, you may notice your dog vomits bile along with grass during the night. This just means the dog wasn't able to digest the grass and has happened to vomit it up on an empty stomach.

Long-Term Consequences

There aren't usually other significant accompanying symptoms in the dog with morning vomiting episodes and the dog remains happy, active and hungry afterwards.

However, it is best to seek help from a veterinarian to identify the exact cause and come to a correct diagnosis. Your dog may be suffering from overproduction of bile or from an irritated stomach due to it being empty for too long.

In both cases, long term, left untreated, the symptoms may worsen and even lead to esophageal ulceration. There also may be some serious possibilities to consider such as irritable bowel syndrome, intestinal blockages, pancreatitis or food allergies to name just a few.

For more possible causes of vomiting bile see 'Why is my dog vomiting bile?"

GastroElm Plus
GastroElm Plus

Specially formulated for noisy stomach, ulcers, colitis, acid reflux, vomiting, and diarrhea in dogs and cats. Coats the animal's stomach and digestive tract, allowing it to heal.


For Further Reading


This article is not intended to replace professional veterinary advice and should not be used as a diagnostic tool. If your dog is vomiting bile and requires any veterinary-related advice, please contact your veterinarian promptly.

More by this Author

Comments 3 comments

ladyguitarpicker profile image

ladyguitarpicker 22 months ago from 3460NW 50 St Bell, Fl32619

I use to give my dog a large milk-bone in the evening and he stopped the vomiting. If I didn't we had that awful yellow stuff. Very informative hub.

alexadry profile image

alexadry 22 months ago from USA Author

Thanks! There are many dogs with this vomiting bile issue and the remedy is very simple! Glad to hear it helped your dog.

Lilly 7 weeks ago

Thanks a ton! I read this article and added another meal to her diet and it worked wonders.. informative and helpful article :)

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.

    Click to Rate This Article