CHICAGO, 2013-08-20 — /travelprnews.com/ — The Chicago Department of Aviation (CDA) today debuted a grazing herd as part of a Sustainable Vegetation Management initiative at O’Hare International Airport. The herd, consisting of 25 goats, sheep, llamas and burros, actually arrived at the airport in late July 2013 and began its work on up to 120 acres… Read the full press release