DH and I are beginning to think we are allergic to pine shavings. I have been looking into possible alternatives and the guy at the feed store suggested Rice Hulls. I'm wondering if anyone has experience with them. Are they absorbent. do they control smell. etc etc. I want a material that I can sift through a coarse screen to get the poo out of the coop. I thought of course sawdust, but I'm guessing I'll have allergies to that too. Suggestions?