Allergic reactions in dogs usually manifest as digestive problems or dermatological irritation. Dog skin allergies come in various severities from patchy, scaly skin with hair falling out to slightly more than normal amounts of scratching.
When your dog exhibits a skin ailment, it's important to take him or her to the veterinarian. Some of these ailments are caused by parasites, and cannot be effectively treated without an anti-parasitic medications. If the vet diagnoses allergies, then your can start to treat for them.
Just because the effects show on the skin or coat does not mean that your dog was exposed to it that way. Some allergens are topical, such as rubbing on a bush that the dog is allergic to, but others are related to diet or environment. A dog that is allergic to his or her food may have dry, patchy skin or other dermatological symptoms.
Usually, the general treatment for dogs with allergic symptoms is to try and remove as many allergens from their lives as possible. Then, if the problem clears up, potential allergens can be re-introduced one at a time to find out what the problem is. The process usually starts with switching the dog to a low-allergen food, because like people, many dogs have wheat and other grain allergies, and many dog foods contain these products.
I'm a dog health practitioner who specializes in treating dog allergies.
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