I have a 10' by 12' peachick (baby peacocks) building they stay in when little. The floor is covered with 3 inches of pine shavings. I do sometimes see the chicks eating it but have never lost a chick in the 3 years of using them. I've lost no chicks to anything so must mean they work pretty well keeping their habitat sanitary. They also can go out the door onto the ground of their outside run is about the same size. Natural dirt, leaves and some large chunk cedar shavings from us renting a chipper years ago to chip cedar we cut down on our property. I know you'll now say NEVER USE CEDAR but this has aired out on the property for years and it used only outside in fresh air. Have had no problems, illnesses or deaths. In fact my birds are healthy healthy. I worm them every 6 months.