BTW, the amount of irritating oils in pine shavings is very minimal...but also, rodent cages have plenty of ventilation too, UN-like the enclosures that many of you
use for your snakes, where snakes are stuck breathing whatever substrate you put in. But either way, even with all the ventilation possible, cedar is very irritating
to the lungs of rodents & causes issues, some say toxic too...it's a no-go for BOTH rodents & snakes. (cedar is great for repelling moths in your closet though)