I never use anything that has the possibility of causing harm to my colelction. Why risk killing off a 1000$ animal cause you want the more naturalistic look.
Newspaper or aspen is your best bet for your reptiles. Stick with what is known to work and be SAFE
As for feeders i been using Equine fresh pine pellets with pine shavings and feed them to my snakes and nothing. In order for anything to really affect a snake would need pro longed exposure to one substance. Remind you snake eating a pine shaving off a rat will be digested and within hours as their acids are highly abrasive.
