It is indicated in animals where the avoidance of antigens is impossible, symptoms are present for more than 4 to 6 months out of the year, and fatty acids and antihistamines do not provide satisfactory results. An animal must undergo intradermal skin testing prior to hyposensitization. After the antigens to which the animal is allergic have been identified through testing, a commercially prepared injection containing the altered antigens is injected into the dog. Depending on the type of product used a series of weekly or monthly shots are given. The animal then becomes de-sensitized to the offending allergens.
Treatment is time consuming and requires a dedicated owner and veterinarian.
I feel that this treatment is an excellent option in severe cases of atopy especially in young dogs. This testing and treatment option is currently grossly underutilized in the veterinary profession but is gaining in popularity. If you have an allergic pet that is not responding to conventional treatment seriously consider this as a treatment option. Steroids are extremely effective for relieving severe itching and inflammation. The problem is that they can have many short and long term side effects if not used correctly.