I feed mine on their bedding, newspaper lol. The boas are on reptibark and coco husk, both have no issues eating directly on the bedding.
0.3 Normals (Coilette, Athena and Mary Jane)
1.0 Pastel (De Sol)
1.0 Spider (Zeus)
1.0 Mojave (Prometheus)
0.1 Brazilian Rainbow Boa (Stella)
0.1 BCI (No Name Yet)