I have seen these before and have heard they work if you keep moving them. This particular brand was brought to my attention by one of our members. This silhouette will spin and wobble in the wind, tricking the geese into thinking it is a live dog. If we keep moving them around the area (every 2 days), the geese won't realize that they are not real dogs. We have put up 3 of them around holes 8 and 9.