( CNN ) -- Have you herd ? Goats are now scheduled to land at Chicago 's O'Hare Airport for a meal and some landscaping . The city 's aviation authority was n't kidding Wednesday when they announced a two-year contract for `` sustainable vegetation management grazing services '' with Central Commissary Holdings . Twenty-five to 30 of the four-legged creatures will chow down on 120 acres of foliage at the airport , including space along creeks and hilly areas too hard and expensive to maintain using other methods , a press release said . To ensure the animals do n't try to head butt a 747 they will be separated from the airfield by security fencing , remain supervised while on airport property , and spend evenings in a nearby transport trailer . The curse of the Billy Goat may have haunted the Chicago Cubs for decades , but the airport believes embracing the animals will save money , reduce carbon dioxide emissions and cut down on toxic herbicides . `` This pilot program will help the CDA achieve many economic , operational , environmental and social benefits , achieving our goal of balancing people , planet and profit , '' Aviation Department Commissioner Rosemarie Andolino said in the release . There 's no word if the goats will help with World Series hopes . The overall cost for two years of weed eating goats could reach $ 100,000 , but the Chicago Department of Aviation is quick to point out it uses no local or state tax dollars for operations or capital improvements . Other airports have tried grazing goats with mixed results . San Francisco airport uses a herd for two to three weeks each June to clear vegetation for a fire break on the west side of the airport . `` The benefits of the goats is this property is home to two endangered species , the San Francisco Garter Snake and the California Red Legged Frog , '' SFO Airport Duty Manager Doug Yakel told CNN . `` They can clear this vegetation for us without endangering these two species , where heavy machine or mowing might . '' But Seattle 's Sea-Tac Airport kicked the goats out after only a week in 2008 . `` Airport managers decided to discontinue using the goats because they were , in effect , too effective , '' said Christina Faine , an airport spokeswoman . `` Goats , indiscriminate eaters , eat everything , including the trees and native plants that we wanted to protect . '' Chicago 's goat herd is expected to arrive at O'Hare in about a month .
Chicago 's O'Hare Airport continues to use goats as landscapers . The herd will munch on several acres of foliage at the airport . Other airports have used goats with mixed breeds .