So my babies like to use the drain field from our septic tank as a dust bath. This is going to cause some problems if they keep digging down into it. To try and solve this problem I built them a nice dusting box and filled it with nice soft sand. You think they will use it? No! They scratch around in it and peck at it but go right back to the drain field for dusting. Any ideas how to get them to use this nice dusting box instead?