I recently had one of my adult Kingsnakes sneeze and expectorate mucous. Vet reports indicated No infection, and snake now seems OK. I keep all my snakes on Sani-Chip Aspen bedding. Would it be better to use the Laboratory Grade Shredded Aspen? My thoughts are that this would probable be less dusty and the shredded Aspen would have little or no "fines" perhaps taken in as snake breathes. Any thoughts would be appreciated? Thanks much, Don