Why is that Dog Throwing up Undigested Food?

Otherwise known as emesis or vomiting, throwing up is the forceful discharge of stomach contents from the stomach up through the esophagus and out through the mouth. While this can be a completely ordinary happening, throwing up undigested food by dogs could also be as a result of either mild infection or severe infection in the body. Veterinarians and dog specialists have ways of helping you know the reason for your dog's vomiting depending on various circumstances. If you follow their instructions, you could get an understanding of the causes and better still know how to cure and control vomiting in your dog.

dog looking at food on the table

Causes of Vomiting in Dogs

As mentioned above, the process may be natural but in most cases is as a result of infections. So then, how do you tell the difference?


This is a natural process for dogs that entails the expulsion of unprocessed foods and fluids from the esophagus mainly to act as food to their newborn puppies. There should be no alarm about this behavior; it is entirely reasonable.

Poor eating habits

Another reason a dog can throw up undigested food is if he or she eats too fast or has too much food to eat. This causes discomfort to the stomach walls which in turn ‘view' the incoming food as foreign species and strive to eliminate it. If your dog gets to play as soon as he is done eating, he is bound to disrupt the normal functioning of the digestive system and end up vomiting.

Food type

Your dog needs to eat fresh and healthy food in every single meal. If you give your dog food that is too sugary, fatty, spoilt, or expired, his body system will automatically realize it and try to eliminate it via vomiting. A change of food from the regular diet can also cause your dog to throw up undigested food. It is always best to gradually introduce new food or diet for your dog if that will become its daily food. Sometimes while out playing, your dog might ingest foreign bodies like herbs, grass, poop, toys, or anything considered harmful by his system. This may not work with your dog’s stomach hence they vomit to expel the harm.

Underlying health concern

Once in a while could be normal for your dog to throw up undigested food. But frequent episodes of the same should serve as a warning of impending health concerns. Some of the health conditions associated with vomiting of undigested food are bacterial infections, intestinal infections, diseases of primary organs like the kidney, liver, and pancreas, and even cancer. If your dog is having unusually regular episodes of vomiting almost immediately after meals, you should visit your vet for a check-up and advice. This should alarm you even more if your dog has a fever, blood in stool and urine, or is dehydrated as this is a clear sign of a severe underlying condition that needs to be looked into.

Anxiety and excitement

General stress can cause your dog to throw up undigested food. A new environment, new family, noisy surroundings among more will make your dog anxious to the extent of interrupting the digestive system thus causing rejection of incoming food by the stomach.

Preventing Vomiting in Dogs

Managing vomiting in your dog will stop him from the results of vomiting that include but are not limited to dehydration, loss of body weight, weak body systems, low immunity, inflammation of the esophagus tract, nutritional and dietary deficiencies, and in severe cases death due to a weakened neurological system. There are, however, ways to salvage the situation before it gets out of hand.

See the vet

  • The surest way to determine the cause of your dog's vomiting is by having him checked up regularly. The vet gets to identify any conditions that are cropping up and help your dog feel better with treatment if there is a need for one.
  • Control your dog's eating speed

    Consider investing in a feeding bowl that is made mainly with compartments that slow down the dog's speed during mealtimes. This will prevent your dog from inhaling a lot of air as he eats to cause stomach discomforts.

    Fresh and healthy food options

  • Go for fresh foods for your dog and if you are buying him dry foods ensure that you check their expiration dates and shelf life to ensure it is within the healthy range.
  • Re-introduction of food

    If your dog overeats food, it is time to consider re-introducing food to him in measured and trained portions to curb the excessive feeding that leads to vomiting.

    Manage anxiety

    When introducing your dog to new environments, places, and people, consider training him and introducing him gradually to let it sink in as opposed to doing it so sudden that it causes stress and anxiety to your dog.

    Monitor your dog

    Playtime for your dog should be taken seriously as should any other time. Close monitoring will see to it that you ensure your dog's safe play and prevent him from munching on the toys and dirty bones. This also allows you to watch everything your dog eats and act fast if he ingests poisonous and harmful herbs or twigs. If he does, perform fast first aid on him before rushing to the vet for more treatment.


    Vomiting of undigested food in dogs could be normal, but could also be caused by infections and harmful substances introduced into the body systems. Prevention of vomiting in dogs solely relies on identifying the exact underlying cause of the dog's vomiting to focus on treating or controlling it. This, as a result, will help control and eventually stop your dog from vomiting undigested food.  Watch out for extreme cases where there is blood in your dog’s poop or urine, fever, and dehydration and seek immediate expert advice to prevent infections from turning fatal and life-threatening. So, the next time your dog pukes freshly ingested food, do not go “eeew!” or “yuck!” Quickly assess your dog and adjust any necessary changes and if it persists, seek veterinary advice. Above all, exercise your dog regularly and have him drink enough water to keep his systems up and running.