Stomach Flu with Bloody Diarrhea in Dogs

Hemorrhagic gastroenteritis is identified by blood in the vomit and/or stool, often due to a food borne illness. Because it is a serious disorder that can be potentially fatal, immediate veterinary care is required.

Symptoms

Continuous vomiting and/or diarrhea are the most common symptoms.

Other symptoms include:

• Lethargy

• Listlessness

• Anorexia

• Weight loss

• Fluid loss

• Electrolyte imbalance

• Dehydration

• Hemoconcentration

• Hypovolemic shock

Causes

Infectious gastroenteritis is caused by pathogens (infectious agents). Some of the pathogens most commonly associated with infectious gastroenteritis include:

• Bacteria (e.g., Campylobacter, Salmonella, E. coli, Clostridia)

• Virus (e.g., Parvovirus, Canine distemper)

• Fungi (e.g., Aspergillus, Penicillium, Fusarium)

• Parasites (e.g., Roundworms, Hookworms, Tapeworms, Whipworms, Coccidia)

E. coli, Salmonella and Corynebacterium are the most significant intestinal pathogens because they can be passed from animal to human or vice versa. Salmonella infections are also important due to the association with reproductive disorders.

Sudden dietary changes and/or dietary toxins may cause irritation and/or affect the immune system. Eosinophilic gastroenteritis, a chronic form of the illness, has been associated with allergens in dog foods. Gastroenteritis may be also observed due to irritation caused by stress, toxins, physical obstruction, ulcers, and abdominal disorders.

Gastroenteritis is not specific to any breed or gender, however, small breed dogs are more prone to infectious gastroenteritis.

Diagnosis

It may be difficult to identify the cause of gastroenteritis. Therefore, invasive diagnostic procedures may be required if routine diagnostic procedures are not successful.

A brief outline of diagnostic procedures:

Medical history:

• Physical obstruction, tumors, ulcers, intestinal blockage, etc.

• Information about the severity, progression and magnitude of the vomiting and diarrhea

• The vaccination record may help in ruling out a parvoviral infection

Physical observations:

• A skin test to determine the presence and extent of dehydration

• An abdominal palpation to check abdominal pain and/or abdominal obstruction

• An examination of mucus membranes to determine hemorrhagic losses

• Cardiovascular function provides information on dehydration and/or blood loss

• Visual observation of the vomit and/or stool to determine if there is blood present

Routine blood/biochemical tests:

• Packed cell volume (hematocrit) data to confirm hemorrhagic gastroenteritis

• Biochemical tests (i.e., liver, kidney, blood protein, and blood sugar)

Fecal study:

• Cultural assays to identify any potential microbiological or parasitic organisms

Radiographs/endoscopy:

• To locate any potential physical obstruction, tumor, ulcer, intestinal blockage, etc.

Treatment

In most of the cases, dogs recover and respond very well. The course of treatment, however, is dependent on the underlying cause of the condition. A brief outline of treatment is given below:

• Fluid and electrolyte therapies are important, especially in cases of hemorrhagic gastroenteritis.

• Antibiotic therapy may be restricted to animals with systemic infections.

• Corticosteroid therapy is useful in cases of shock. Usually hypovolemic shock develops due to dehydration.

• Dog medications that soothe the intestine and bind noxious agents can also be used in supportive therapy.

• Parasitic infections are treated with anthelmintics.

• Physical obstruction, ulcers and tumors may need surgical treatment.

Living and Management

An improved diet may reduce intestinal infections and other gastrointestinal disorders. The main priority should be to provide healing time for the dog's inflamed intestinal area. Thus, food and water should not be given for at least a period of 24 hours to rest the intestine. Then, provide a bland diet for three to seven days, followed by a gradual return to the dog's normal diet.

Often dietary irritants (especially protein) may lead to a recurrence of the problem. In these cases, a special hypoallergenic medical diet may be required.

Prevention

Some veterinarians have recently emphasized the importance of restoring intestinal microflora through food additives (e.g., probiotics, prebiotics, and synbiotics) in order to prevent the infection from recurring.

If dog owners are using homemade diets, the ideal micro- and macro-nutrient profile, along with optimum energy density, must be the focus of formulation. These diets provide highly digestible nutrients, less fats and restricted osmolarity. Consult your veterinarian for a proper, well-balanced diet for your dog.

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Diets for Pets with Heart Disease

It is now known that the diet is a very important part of medical therapy for heart disease and one in which owners have the most crucial role. New research is showing that proper nutrition may be able to slow the progression of heart disease, minimize the number of medications required, improve the quality of life or, in rare cases, actually cure the disease.

Maintaining Optimal Weight

A key goal for the nutritional management of heart disease is to maintain optimal body weight, because both weight loss and obesity can be harmful to your pet. Owners should watch their pets for loss of overall body weight and loss of muscle (cachexia describes muscle loss seen in animals with heart disease).

Many pets with heart failure will not eat as much, as frequently, or the same things as when they were healthy—this is called anorexia. This can be an important factor in the weight and muscle loss that occurs. Maintaining your pet's interest in food is a tricky, yet important, task but there are several tips to achieving this.

First, try giving more frequent, but smaller meals. Cats frequently are more interested when the food is warmed. Dogs are less predictable, but will usually prefer one temperature over another (try different temperatures—warmed, room temperature, cold or even near-frozen).

Another method to manage reduced or changed appetite in an animal with heart disease is to gradually replace their current food with a new one. For example, switch from a dry food to a canned food or change to a different brand. However, be sure to talk to your veterinarian about the diet that is most appropriate for your pet.

Finally, flavor enhancers such as cooked meat or fish (without any salt; avoid deli meats) for dogs and cats, or sweeteners (such as yogurt, maple syrup, applesauce or honey) for dogs may be added to the diet to promote eating. Fish oil may be given to help with cachexia.

As it is important to make sure animals are not too skinny, it is also necessary to make sure they are not too heavy. Owners often find that severely overweight dogs and cats with heart disease that successfully lose weight, appear to have less trouble breathing and are more comfortable. A special diet may be prescribed for your dog or cat to help treat the heart disease as well as to maintain their optimal body weight.

Important Nutrients for Pets

Nutritional deficiencies are now uncommon in dogs and cats unless owners are feeding a nutritionally unbalanced diet. If your animal is eating a homemade, raw or vegetarian diet, or a diet made by a small company, please let your veterinarian know this as it could be important in the diagnosis or treatment of your pet.

Even if your pet doesn't have a specific nutritional deficiency, increasing the levels of certain nutrients may have benefits in the treatment of heart disease. Nutrients that may need to be supplemented are described below. It is important to keep in mind that dietary supplements have little regulation so quality control can be a big problem. Cummings School recommends using dietary supplements that bear the logo of the United States Pharmacopeia Dietary Supplement Verification Program (DSVP), which tests human dietary supplements for ingredients, concentrations, dissolvability and contaminants. Another good resource is ConsumerLab.com, which performs independent testing of dietary supplements primarily for human supplements but also for pet products as well.

Taurine

Taurine is an amino acid which, if deficient, can cause a specific heart disease called Dilated Cardiomyopathy (DCM) in cats. Complete and balanced commercial cat foods have enough taurine but diets that are not complete and balanced (labeled as for intermittent or supplemental use only), vegetarian diets or homemade diets can be too low in this nutrient. If your cat is diagnosed with DCM, the cardiologists will usually test their blood taurine level to see if they are deficient and prescribe supplements to help treat the disease.

Dogs, unlike cats, are not thought to require taurine in the diet. However, certain breeds (Cocker spaniels, Newfoundlands, St. Bernards, English setters, Labrador and Golden retrievers) may require some in the diet to avoid a deficiency. Lamb and rice diets, very low protein, and high fiber diets in these predisposed breeds may make it more likely for them to develop taurine deficiency. Dogs of these predisposed breeds that develop DCM may have their blood tested for taurine levels. Most dogs with DCM do not have taurine deficiency but when levels are low then taurine supplementation can help in the management of heart failure.

Omega-3 Fatty Acids (Fish Oil)

Certain types of fatty acids present in fish oil (called omega-3 fatty acids) have been shown have a positive effect in dogs with heart disease. Omega-3 fatty acids do not help to prevent heart disease as they do in people. This is because in people, omega-3 fatty acids have a beneficial effect in coronary artery disease, which does not occur in dogs and cats. In pets with heart disease, fish oil is recommended for dogs and cats who have reduced or altered appetite or any muscle loss (cachexia). Omega-3 supplements can also be used (in addition to appropriate medication) in the treatment of dogs with abnormal heart rhythms (arrhythmias).

Fish oil may be purchased over-the-counter at almost all human pharmacies but dose and quality of the products vary widely. Cummings School generally recommends a one gram fish oil capsule that contains 180mg of eicosapentaenoic acid (EPA) and 120mg of docosahexaenoic acid (DHA). The quality control of the individual product should be checked to ensure your pet is getting the right amount and is not getting unwanted nutrients or contaminants. Various ways to check quality control of dietary supplements are mentioned above.

With capsules of this size most dogs and cats can be given one capsule per 10 pounds of body weight. Fish oil is relatively safe but if your pet has a bleeding disorder or is already eating a diet high in omega-3 fatty acids, supplementation should be carefully considered with your veterinarian. Fish oil supplements should contain vitamin E as an antioxidant, but other nutrients should not be included. Cod liver oil and flax seed oil should not be used as sources of omega-3 fatty acids in dogs and cats.

Restricted Nutrients for Pets

While supplementing important nutrients may prove beneficial, it is equally true that reducing the levels of certain nutrients may have benefits in the treatment of heart disease. Nutrients that may need to be restricted are described below.

Sodium

Depending on the severity of heart disease, decreasing the amount of sodium in the diet can be beneficial. In pets with mild heart disease (those that are not showing any symptoms), only mild sodium restriction is recommended. If the heart disease is more advanced, causing a condition known as Congestive Heart Failure (CHF), greater sodium restriction is advised. Talk to your veterinarian about the diet that would be most appropriate for your dog or cat. Diets that are low in protein should be avoided unless the pet has severe kidney disease. Cummings School provides a reduced sodium diet list in the PDF format for your convenience.

While it is important to feed the most appropriate pet food given your animal's type, level of heart disease and other medical issues, it is also necessary to remember that large amounts of sodium can also come from treats, table food and the foods you might use to give daily medications. A list of treats for dogs with heart disease is also provided in the PDF format. Be sure to talk to your veterinarian about which treats can be safely fed to your pet.

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Can animals have high blood pressure?

Just like people, our pets have blood pressure too and they also risk developing high blood pressure. While high blood pressure in humans can cause more serious health issues, high blood pressure in animals is usually associated with a more critical health issue, because hypertension is typically the result of an existing underlying disease.

High blood pressure in dogs is often associated with Cushing’s disease or hyperadrenocorticism. Cushing’s disease is when a disorder, usually a benign tumor, allows an excess of cortisone to be released into the bloodstream.

Cats often develop high blood pressure as a result of having hyperthyroidism and/ or kidney disease. Hyperthyroidism is an overproduction of a thyroid hormone that results in increased metabolism.

If your pet has already been diagnosed with, and is being treated for, hypertension, your veterinarian will need to treat the underlying condition that caused the high blood pressure. It is also likely your veterinarian will also want to measure your pet’s blood pressure every three months moving forward. The vet may also suggest performing other tests, such as a complete blood count, blood chemistry panel, and a urinalysis every six months.

For most of us our pets are part of the family, so make sure they get a regular annual check-up with their veterinarian. Don’t ignore your vet’s advice, or at least get a second opinion before you make a potentially life and death decision on your fur baby's behalf.

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Related: We have more information under our dog health + cat health categories.