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  • PROBIOTICS


    Probiotic supplements are everywhere. You might be taking one. Should your dog?

     

    Nutritional supplements containing live microorganisms (bacteria and/or yeast) that aim to improve health can be considered probiotics. They are typically used to improve the workings of the gastrointestinal tract, and they certainly do play an important role in this regard.

     

    Consider a dog with diarrhea, for example. Whatever the cause—stress, dietary indiscretion, infection, antibiotic therapy—the diarrhea will sometimes persist even after the initial problem has resolved. The blame often lies with an imbalance between two categories of gut microorganisms:

    • those that promote normal, healthy gastrointestinal function
    • those that secrete toxins or are otherwise disruptive when they are present in larger than normal numbers

     

    Probiotics are essentially a way of boosting the number of “good” microorganisms present in the gastrointestinal tract, thereby helping them to out-compete the “bad” ones.

     

    It also appears that probiotics can improve canine health in other ways: They seem to be able to beneficially modify an animal’s immune function.

     

    Studies have shown that probiotic supplementation can help treat infections outside of the gastrointestinal tract as well as some allergic and inflammatory diseases. This isn’t too surprising given that a large proportion of the body’s immune system is associated with the gut. Anything that influences the immune system there could have a wide-spread benefit.

     

    One of the downsides of probiotic supplementation is the fact that the microorganisms aren’t able to effectively stay and reproduce within the gastrointestinal tract for a long period of time. The noticeable benefits of probiotics tend to wane once supplementation is stopped. This isn’t a big problem if you are giving a probiotic to deal with a short-lived problem—say diarrhea associated with antibiotic use—but for chronic disorders, probiotic supplements often need to be given more or less continually. This can be done safely, but the expense and inconvenience may eventually become an issue.

     

    Three strategies are helpful if you find yourself in this situation.

     

    1. Many people have found that when taking probiotics themselves, they can eventually move to an every-other-day or even less frequent dosing schedule. The same is probably true for dogs.

       

      I recommend following the instructions on your dog’s probiotic supplement for at least a month or two to determine what the maximal benefits might be. Then play around a bit to see if you can get away with giving it every other day or just a couple of times a week.

       

    2. Consider adding a prebiotic supplement to your dog’s diet. Prebiotics are non-digestible ingredients that support the growth of probiotic microorganisms. Think of prebiotics as a way to preferentially feed the “good” microorganisms in the gut, giving them a potential advantage in their competition with the “bad” microorganisms.

       

      Fructo-oligosaccharides, beet pulp, chicory, arabinogalactan, and inulin are all commonly used prebiotics for dogs.

       

    3. If you can identify and address the underlying cause of your dog’s symptoms (e.g., poor diet, gastrointestinal or immune disorders, chronic stress, etc.) you may find that probiotic supplementation is no longer necessary.

  • PARVOVIRUS IN DOGS

    The canine parvovirus (CPV) infection is a highly contagious viral illness that affects dogs. The virus manifests itself in two different forms. The more common form is the intestinal form, which is characterized by vomiting, diarrhea, weight loss, and lack of appetite (anorexia). The less common form is the cardiac form, which attacks the heart muscles of very young puppies, often leading to death. The majority of cases are seen in puppies that are between six weeks and six months old. The incidence of canine parvovirus infections has been reduced radically by early vaccination in young puppies.

     

    Signs & Symptoms of Parvo in Dogs

     

    The major symptoms associated with the intestinal form of a canine parvovirus infection include:

     

     

    The intestinal form of CPV affects the body's ability to absorb nutrients, and an affected animal will quickly become dehydrated and weak from lack of protein and fluid absorption. The wet tissue of the mouth and eyes may become noticeably red and the heart may beat too rapidly. When your veterinarian palpates (examine by touch) your dog’s abdominal area, your dog may respond with pain or discomfort. Dogs that have contracted CPV may also have a low body temperature (hypothermia), rather than a fever.

     

    How is Parvo Spread?

     

    Most cases of CPV infections are caused by a genetic alteration of the original canine parvovirus: the canine parvovirus type 2b. There are a variety of risk factors that can increase a dog’s susceptibility to the disease, but mainly, parvovirus is spread either by direct contact with an infected dog, or indirectly, by the fecal-oral route. Heavy concentrations of the virus are found in an infected dog’s stool, so when a healthy dog sniffs an infected dog’s stool, it will contract the disease. The virus can also be brought into a dog's environment by way of shoes that have come into contact with infected feces. There is evidence that the virus can live in ground soil for up to a year. It is resistant to most cleaning products, or even to weather changes. If you need to clean up a parvovirus-contaminated area, first pick up and safely dispose of all organic material (vomit, feces, etc.), and then thoroughly wash the area with a household bleach solution, one of the few disinfectants known to kill the virus.

     

    Improper vaccination protocol and vaccination failure can also lead to a CPV infection. Breeding kennels and dog shelters that hold a large number of inadequately vaccinated puppies are particularly hazardous places. For unknown reasons, certain dog breeds, such as Rottweilers, Doberman Pinschers, Pit Bulls, Labrador Retrievers, German Shepherds, English Springer Spaniels, and Alaskan sled dogs, are particularly vulnerable to the disease. Diseases or drug therapies that suppress the normal response of the immune system may also increase the likelihood of infection.

     

    Diagnosis of Parvovirus in Dogs

     

    CPV is diagnosed with a physical examination, biochemical tests, urine analysis, abdominal radiographs, and abdominal ultrasounds. A chemical blood profile and a complete blood cell count will also be performed. Low white blood cell levels are indicative of CPV infection, especially in association with bloody stools. Biochemical and urine analysis may reveal elevated liver enzymes, lymphopenia, and electrolyte imbalances. Abdominal radiograph imaging may show intestinal obstruction, while an abdominal ultrasound may reveal enlarged lymph nodes in the groin, or throughout the body, and fluid-filled intestinal segments.

     

    You will need to give a thorough history of your pet's health, recent activities, and onset of symptoms. If you can gather a sample of your dog's stool, or vomit, your veterinarian will be able to use these samples for microscopic detection of the virus.

    Is Parvovirus Treatable?

     

    Since the disease is a viral infection, there is no real cure for it. Parvovirus treatment is focused on curing the symptoms and preventing secondary bacterial infections, preferably in a hospital environment. Intensive therapy and system support are the key to recovery. Intravenous fluid and nutrition therapy is crucial in maintaining a dog’s normal body fluid after severe diarrhea and dehydration, and protein and electrolyte levels will be monitored and regulated as necessary. Medications that may be used in the treatment include drugs to curb vomiting (antiemetics), H2 Blockers to reduce nausea, antibiotics, and anthelmintics to fight parasites. The survival rate in dogs is about 70 percent, but death may sometimes result from severe dehydration, a severe secondary bacterial infection, bacterial toxins in the blood, or a severe intestinal hemorrhage. Prognosis is lower for puppies, since they have a less developed immune system. It is common for a puppy that is infected with CPV to suffer shock, and sudden death.

     

    Living and Management

     

    Even after your dog has recovered from a CPV infection, it will still have a weakened immune system, and will be susceptible to other illnesses. Talk to your veterinarian about ways by which you can boost your dog's immune system, and otherwise protect your dog from situations that may make it ill. A diet that is easily digested will be best for your dog while it is recovering.

     

    Your dog will also continue to be a contagion risk to other dogs for at least two months after the initial recovery. You will need to isolate your dog from other dogs for a period of time, and you may want to tell neighbors who have dogs that they will need to have their own pets tested. Wash all of the objects your dog uses (e.g., dishes, crate, kennel, toys) with non-toxic cleaners. Recovery comes with long-term immunity against the parvovirus, but it is no guarantee that your pet will not be infected with the virus again.

     

    Prevention of Parvo in Dogs

     

    The best prevention you can take against CPV infection is to follow the correct protocol for vaccination. Young puppies should be vaccinated at six, nine, and twelve weeks, and should not be socialized with outside dogs until at least two weeks after their last vaccinations. High-risk breeds may require a longer initial vaccination period of up to 22 weeks.