Gastroenteritis in Dogs


Overview of Gastroenteritis in Dogs

Acute vomiting and diarrhea are characterized by a sudden onset and short duration of less than two to three weeks. Acute vomiting, a reflex act that results in the forceful ejection of gastric (stomach) and/or duodenal (intestinal) contents through the mouth, and diarrhea, an increase in fecal water content with an accompanying increase in the frequency, fluidity, or volume of bowel movements, are both extremely common in the dog.

An occasional bout of vomiting and diarrhea is quite common in dogs however, severe, acute vomiting and diarrhea is not normal, and can be associated with life threatening illnesses. It can cause extreme fluid loss, acid-base imbalance, and electrolyte disturbance.

What To Watch For

  • A continuation or worsening of signs (greater than several days)
  • Dehydration
  • Depression
  • Listlessness
  • The presence of blood in the stool or vomit.
  • General Causes of Vomiting and Diarrhea in Dogs

  • Dietary indiscretion – eating inappropriate food/material
  • Dietary intolerance
  • Infectious agents – bacterial, viral, fungal, parasitic
  • Drugs and toxins
  • Obstruction/blockage – intussusception, which is telescoping of the bowel into itself; masses/tumors; foreign bodies        
  • Metabolic disorders – kidney and liver disease, diabetes mellitus, hypoadrenocorticism
  • Abdominal disorders – pancreatitis, peritonitis, pyometra, prostatitis, sepsis
  • Inflammatory bowel disease
  • Miscellaneous – gastroduodenal ulcers, hemorrhagic gastroenteritis, stress, gastrointestinal lymphosarcoma (cancer)
  • Diagnostic Tests for Gastroenteritis in Dogs

    Many cases of acute vomiting and diarrhea are short lived, resolve easily and do not require an extensive diagnostic evaluation. Diagnostics should be performed on those pets that are having severe vomiting and diarrhea, are exhibiting other systemic signs of illness, or when the vomitus or stool contains blood. These tests may include:

  • Complete blood count (CBC)
  • Biochemical profile
  • Urinalysis
  • Abdominal radiographs (X-rays)
  • Multiple fecal examinations
  • Treatment of Gastroenteritis in Dogs

    There are several things your veterinarian might recommend to treat your pet symptomatically. The principal goals of symptomatic therapy are to restore and maintain fluid and electrolyte imbalances and to completely rest the gastrointestinal tract.

  • Fluid and electrolyte therapy
  • Drugs that coat and sooth the GI tract
  • Drugs that symptomatically stop vomiting and diarrhea
  • Nothing orally for several hours, with a gradual introduction of water followed by a bland diet
  • Home Care

    Call your veterinarian, and follow all recommendations regarding feeding and medication. This will probably include withholding all food and water. Observe your pet very closely. If clinical signs are not improving over a day or two, and/or your pet is getting worse, have your pet evaluated at once. 

    In-depth Information on Gastroenteritis in Dogs

    Vomiting and diarrhea are quite common in dogs, largely due to their indiscriminate (not terribly selective) eating habits. It is important to realize that an occasional bout of vomiting and diarrhea can be normal in a healthy animal, and may occur as often as a couple of times in a month. The question that needs to be answered is when is the problem serious enough for you to seek veterinary care and potential hospitalization for your pet? Acute vomiting and diarrhea is addressed quite differently from chronic vomiting and diarrhea with regard to the diseases that cause each, diagnostic plans, and treatment regimes.

    In patients that are otherwise feeling well without concurrent problems, symptomatic therapy is recommended, and usually curative. This involves removing all food and water for a period of several hours, and gradually reintroducing a bland diet for several days prior to reinstituting your pet’s regular diet. If the problem recurs once your pet is fed, or the problem persists despite being held off food, your pet should be evaluated by a veterinarian in a timely fashion. In addition, if your pet seems painful, in distress, or you notice red or dark brown/black vomitus or diarrhea (suggestive of internal bleeding), one should seek veterinary attention at once. Small dogs are particularly prone to dehydration and hypoglycemia in the face of prolonged vomiting and diarrhea, therefore should be watched very carefully. Prolonged, frequent vomiting and diarrhea can lead to severe dehydration, shock, and potentially death if not addressed in a timely fashion.

    Causes of Vomiting and Diarrhea in Dogs

    There are many causes of acute vomiting and diarrhea. Although many of these patients have self-limiting disease, and respond nicely to symptomatic therapy, some causes of acute vomiting and diarrhea can be life threatening, and initially, may be difficult to differentiate from more benign disorders.

    Dietary Causes: 

  • Dietary indiscretion includes eating spoiled food, over eating, ingesting foreign material and sudden dietary changes.
  • Dietary intolerance most often occurs because of a particular protein, but can be associated with lactose, diets high in fat and certain food additives.

    There are many infectious agents that can cause acute vomiting and diarrhea:

  • Bacterial (Salmonella, Clostridium)
  • Viral (Infectious canine hepatitis, parvovirus).
  • Fungal (Histoplasmosis, aspergillosis)
  • Rickettsial (Salmon poisoning)
  • Parasitic (roundworm, hookworm, whipworm, giardia).
  • Drugs and toxins can cause vomiting and diarrhea by directly irritating the lining of the gastrointestinal tract. Examples include anti-inflammatory agents (aspirin, corticosteroids), antibiotics, anti-cancer drugs, insecticides, heavy metals, and pesticides.
  • Gastrointestinal obstruction/blockage often causes vomiting and diarrhea. Foreign bodies, tumors, intussusceptions (telescoping of the bowel into itself), and parasites are the most common causes of obstruction.
  • Metabolic disorders such as kidney and liver disease, diabetes mellitus and hypoadrenocorticism (addison’s disease) are often associated with vomiting and diarrhea.
  • Abdominal disorders such as pancreatitis (inflammation of the pancreas), peritonitis (inflammation of the abdominal cavity), pyometra (infected uterus), prostatitis (inflammation of the prostate) and sepsis (systemic infection) are often associated with an acute onset of vomiting and diarrhea.
  • Inflammatory bowel disease (IBD) is a microscopic accumulation of inflammatory cells of any/all parts of the gastrointestinal tract. IBD is most often associated with chronic vomiting and diarrhea, although there are cases that present rather acutely.

    Miscellaneous disorders:

  • Gastroduodenal ulcers can be associated with liver, kidney, or pancreatic disease. Acute vomiting and diarrhea, with or without blood, are often the first signs exhibited by the pet.
  • Hemorrhagic gastroenteritis presents with acute bloody diarrhea, and occasionally acute vomiting as well.
  • Gastric dilation volvulus/torsion is the bloating and/or twisting of the stomach upon itself. The affected individual usually present with acute unproductive retching or vomiting, often accompanied by diarrhea. This is a life-threatening disease that needs to be addressed immediately.
  • Stress can cause a combination of acute vomiting and diarrhea.
  • Lymphosarcoma is most often a microscopic accumulation of cancerous cells within the gastrointestinal wall. Although signs are usually that of chronic vomiting and diarrhea, occasionally acute signs develop first.
  • <

    Pg 1 of 3