i have been keeping my 6 growing pullets in the house. they are so sweet and love attention.i went to do their pens and went into a breathing/wheezing attack. Now i'm not allergic to THEM,because i can hold my girls without tripping my sneezing wheezy response,but ONLY when i try to clean the pen i wheeze horribly.i have them on a sand bedding(wich is new,no issues when they were kept on straw but the odor was not great and my dogs were pulling the straw all over the house,for the cats who then peed on it.) wich i thought would control odor......not working. i need to try to keep them inside,and they have a desperate need for odor control,and a better clean up. can some one who has house chickens give some help on a better substrate,and odor control with easy clean up? its just an area to roost,because i'm putting them outside daily in a secure pen or loose in my yard while i can watch them. can they be on cedar chips or cat litter? or is there ANYTHING i can do to help this issue. Thanks in advance.