I've seen them reject holes because it doesn't compact well enough. Use potting soil, the cheap black stuff, with no additives, no vermiculite, no perlite (styrofoam balls), etc.Today my female ambilobe dug a tunnell in her container in her cage . She came all the way out but nothing was in there. My experiance is only with veileds. Do the panthers practice before they lay their eggs. Thanks any input would be greatly appreciated.