Hello. I personally would stay away from wood shavings if I don't know what type of wood it is just because I don't want to risk my hamster developing a respiratory issue. Aspen is known for being safe for hamsters because of its soft texture so that is an option if you want to mix it with your current bedding. Make sure that bedding is aspen if not and you really want to use it make sure that it has no strong odors and does not have sharp wooden parts in it. Hope that helps
