Often, it's necessary for a general veterinary practitioner to refer a pet to a veterinary dermatologist for this testing. Recently, blood tests have been developed to allow allergy testing without injections into the skin. These have become better understood recently and are correlating with the skin testing fairly well, although it is generally agreed that skin testing is still more accurate. Allergy injections require a consistent effort from the pet owner. They are the preferred treatment for inhalant allergies if that is the only condition affecting dog, when effective.
Fleas cause most the allergic reactions in pets.
Flea control is essential to your success in treating itchy dogs. When itching can not be adequately controlled by one of the above methods, they usually use a corticosteroid, such as prednisone. Cortisones are the most consistently effective anti-itch medications available. Cortisones increase the amount of water your pet drinks, making it urinate more, too. Sometimes this becomes a problem.