I work at a drive thru where we sell livestock grain in bags and because we keep both ends of the building open(drive thru) we get probably 3 to 4 dozen of chickadees and sparrows flying thru and picking holes in the bags to get the grain inside. This causes issue cuz we have to go tape up the bags but they just move to another bag later and make messes. Because of feed safety standards we can't have any kind of poison near the bags so that won't work but I need something that can make a loud enough sound to scare them out but would preferably have a 10-15 minute recurring timer that I don't have to go reset after every time. Kimd of a specific request but im not really sure where else to look because the internet isn't helping. Anybody knowledgeable in repelling birds i would appreciate your advice thank you.