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Water - The Most Important Nutrient for Horses
Water is the most important nutrient that we provide for horses on a year around basis. Horses need 2 to 3 times more water than other feedstuffs. An 1100 lb horse on a dry forage diet at an average temperature...
Fall Pet Allergies
As the heat and humidity of the summer begins to wane, many of us look forward to the cooler, fall weather and, at least in the northeast, the beauty of the changing foliage. For many of us including our pets, this change of season is the start of fall allergies.
Cats and dogs have seasonal allergies (atopy or allergic dermatitis) to mold and pollen just like we do. The main difference is the way in which they show it. Allergies are a hypersensitivity or immune system overreaction against common, otherwise harmless substances in our environment. These allergens get in through the skin because of abnormalities in the skin’s protective barrier and/or abnormalities to the matrix between skin cells, much the same way water seeps into a brick wall with crumbling mortar. Seasonal allergies are most commonly caused by tree, grass, and plant pollens or mold. In pets that have year-round environmental allergies, indoor allergens are likely to be the cause because they are exposed to them continuously. In fact, 75% of dogs with year-round allergies are allergic to house dust mites, an indoor allergen. Food allergies can also be the cause of year-round allergies, but that is a topic for another time.
Most dogs and cats typically begin showing seasonal allergies in the first one to three years of life. The symptoms may initially be mild but may get worse over time. Any dog can become allergic and since there is a hereditary component, certain breeds are overrepresented. They include the Golden Retriever, Labrador Retriever, West Highland White Terrier, Bulldog, Boxer, Pug, Shih Tzu, Lhasa Apso, and the Chinese Shar-Pei.
The most common symptoms include licking, scratching, chewing, and rubbing at the feet, face, hind end, armpits and abdomen. In cats, they may present as a raised, crusty skin lesion called milliary dermatitis. Allergies can also present as recurrent skin and ear infections which can cause hairlessness, redness, thickening and pigmentation of the skin. These infections are caused by bacteria and yeast which live naturally on the skin, and when present can make the itching associated with atopy more intense.
The diagnosis of seasonal allergies is most frequently based on clinical signs and age of the patient. A positive response to low-dose steroids can also aid in the diagnosis. The specific allergens that your pet is allergic to can only be determined by a blood test or intradermal skin testing.
Treatment of environmental allergies is centered on controlling the itch or decreasing the immune system’s overresponse to normal allergens found in the environment. Treatment should always be discussed with your veterinarian, but may include:
Avoiding allergens: This is usually not entirely possible. Brushing the hair coat can help remove allergens from the fur and skin, reducing exposure. Wearing a t-shirt and/or foot protection may also limit exposure and absorption through the skin. For dust mite allergies, washing beds frequently or using dust mite covers may help to limit exposure. Avoiding stuffed toys can also help. Allergen exposure can also be reduced by using an air conditioner in the summer or a HEPA filter. Keeping pets indoors when mowing the lawn and stirring up allergens may help. Frequent bathing with a hypoallergenic shampoo and using a conditioning rinse or spray to moisturize the skin is beneficial for many pets.
Medications: Many medications are available to reduce the signs and symptoms but they do not get rid of the allergy. They include antihistamines such as Benadryl® and Claritin®, omega 3 fatty acids high in EPA and DHA, steroids such as prednisone or dexamethasone, immune modulators such as cyclosporine, Janus kinase inhibitors such as Apoquel®, and a new soon to be available Interleukin-31 antibody.
Allergen Specific Immunotherapy: This treatment regimen is dependent upon allergy testing. Once your pet’s allergens are identified, a specific “allergy vaccine” can be made to desensitize the immune system to specific allergens. This is effective in about 70% of dogs and is most beneficial when started at a young age. Desensitization is done by injection or oral therapy under the tongue and may require six months to two years to see a benefit.
If you think your pet may have fall allergies, speak with your veterinarian, so together, you can make the best treatment choice for you beloved companion.
The feed room is proudly brought to you by Nutrena and Cargill Animal Nutrition. Learn more about us here. You can see the original blog post here.
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