We have 3 red shavers in our backyard, with chicken feeder inside the coop which is obviously in the run. Dozens and dozens of house sparrows (http://www.teara.govt.nz/en/introduced-land-birds/page-11) fly into the coop and nail the feed each and every day. I'm not really keen on having to go out twice per day or so to feed the chickens and would rather the feeder do it's job. Any ideas how to stop the sparrows from nailing the food, short of building or buying a trestle feeder? Any help would be appreciated. Thanks.