A promising new allergy treatment from Europe is derived from of all things, quail egg powder.
The story of quail eggs begins with a French doctor who noticed that farmers who raised quail had fewer allergy symptoms than other patients from the surrounding area. That launched a series of experiments and clinical trials leading to a product that has shown significant reduction of allergic rhinitis.
Gene Bruno has a detailed, well researched story about quail egg powder at Vitamin Retailer magazine. See references tab.