Is it true that chickens should have pine (or other soft wood) shavings rather than hardwood shavings? if so, why? I have access to truckloads of hard wood shavings for $10 each whereas finding pine is harder than losing 20# during Christmas season. If hardwoods are toxic, can someone please provide me any more info? I can't seem to find an explanation & I'm struggling with whether to spend $$ at TSC to get the pine when I can get the other stuff in bulk. Also, what's the preference between fine sawdust or flakes? Any & all info appreciated!