I am having a problem with dust baths. He will roll and do the dust bath motions on towels, the slate stone, carpet, but not in the dust. It's almost like he needs to see another chinchilla do it to understand that's a thing. I've been putting him in a smaller cage lined with dust and having to cover him in it and rub it in best I can. I also put some dust on one of the towels he likes and he just rolls on the edge, avoiding the pile. Are there any other things I can try to get him to understand how to bathe in dust on his own?