hey guys i need you opinion on something. the other day a friend of mine came over the house and saw my flypens. I have thee flypens with the diameters 4x4x6 and has a wooden floor with hay straws for scratch. He then made a suggestions that you shouldn't keep your roosters in the pens for too long because they inhale the dust from the straws and it woulnd't be good for their lungs. now guys this is where you come in what's do you guys think about this suggestions. I change the the straws every 3- 4 weeks and i rotate my birds from cords to the flyens every 4-5 days. is there any other things you can put instead of hay straws? anyone ever tried alphalpha or placing sand in a wooden floor flypen? any suggestions would be greatly appreciated.