Exactly, I used about 40%shavings to 60% bark.
I have almost always been able to get my Dumeril's on F/T, including neonates. Be patient. My adult male has to have his F/T rats served on a dish. Give it time, and make sure it feels secure. Most of all, let it get hungry. Hungry snakes are less picky. Keep trying. Leave it in there overnight.
-----
Zoodude
1.1 Acrantophis dumerli
0.1 Python molurus bivittatus
0.0.1 Morelia veridis
1.1 Elaphe (panthertophis?) obsoleta lindheimeri
0.2 Bogertophis subocularis
1.0 Pogona henrylawsoni
0.1 Geochelone carbonaria
3.2.1 Phelsuma laticaudal laticauda
1.5.1 Eublepharus macularius
0.0.1 Lampropeltis gutulus hobrooki
2.1.12 Elaphe guttata guttata